Caution for installing, don't put inside metal electrical box, it will kill you're Wi-Fi signal. I am moving myeyedro to plastic box.
I am very pleased with this product and would recommend to home owners who have generators not sized for peak demand. This device will keep you from overloading generator by turning off or rotating circuits while generator is running. My internet speed is 100 mbps at transfer electrical box, with box closed the signal is very weak, so weak that I experience intermittent communication failures, with panel door open signal is perfect.

Measuring electricity is something people don't fully understand because unlike water or gas you can't see or feel how much you're using.. Every device in our house is different, 1 hour of TV is not the same as 1 hour using the washing machine, time is irrelevant here because everything has a different level of energy consumption.
And what this little gadget does is give you that information on how much energy you've used and, crucially, how much you're currently using because this is how you realise your bad habits or identify which things in your house are wasting power.

- Hardware: For the wired version, a little 5V plug pack, Ethernet cable, 2 clamps and the box where they connect.
DON'T buy the wireless version!! keep reading.

- Installation: Contrary to what many people say you don't have to be an electrician to install this monitor, simply connect it to the internet and look at the "live" consumption, then put the clamp on every cable inside your breaker box (no need to disconnect anything) until you see it jump, and that's it. Once it's running you can leave it there and forget about it.
When you familiarise yourself with the wiring inside your box I recommend that you tap off directly from the mains to power the Eyedro, that way there's no wires coming in or out of the box (first flip down the main switch of course).

- Software: This is the reason why you purchase this monitor, the fact that it's cloud based and that the unit is always on and connected (no batteries to change etc) means you get a complete picture of your energy consumption at any point in time, if you buy a new TV, if you change your lightbulbs, if it was a particularly hot summer and you used more your AC, it's all made crystal clear for you to see thanks to this web app.

- Cons: Packaging, packaging, packaging. As someone already mentioned the pieces where rattling around in the box, it was so bad in fact that one of the ferrite cores (inside the red clamp) was split in half and the other sensor had a snapped cable. Fortunately I know a bit of electronics and was able to resolder the wire and glue the ferrite back together, it reads around 4% lower but it can be compensated in software I reckon.
Would've been 5 stars easily but I just can't, it was broken after all! sorry Eyedro.

- Summary: Before with a bimonthly bill it was like being blindfolded, like trying to walk forward but only being able to look where you've been. However when you see on a daily basis how much energy you use and in the comfort of your house it makes all the difference, the alternative is go out everyday and write down the reading on your meter but who wants to do that? This alone is worth the asking price.

Useful tip: Don't buy the wireless version it's a $70 upgrade, instead buy a cheap wireless bridge they're around $20 here on Amazon and same small size as the Eyedro (tested with TP-Link TL-WR710N works perfect). An added benefit is you don't loose an Ethernet port on your main router either, which you would with the wireless version.

This works great. There are multiple ways to analyze live and historic data. The graphs are very useful in tracking down or simply watching energy use. You have choices to view estimated bills, monthly/weekly/daily/hourly consumption, weekly reports, live consumption (15 mins to 24 hour graph), vampire (phantom) energy draw, and more. This can be viewed on any computer, or any phone within a browser. There is not a dedicated app, but the mobile website works just fine. The mobile site lacks a few features and settings (basically is simplified with larger fonts) from the full site, but you can tell your phone browser to "view desktop site" if you want to.

It has been very helpful in seeing why my bills were so high and helped to figure out how to reduce the bill. One of the things that became apparent was the taxes and fees are almost 50% of the bill! I have reduced the bill by well over $60 a month so far by making a few changes. I was surprised the dryer was such an energy hog, so I bought a clothes line and saved a bunch of money during the summer months. I was able to justify putting in a new heat pump water heater that saves about $40 a month in electricity and will pay for itself in about two years by seeing what my old water heater electricity consumption was.

Installation was easy, but if you are not familiar with high voltage precautions you need to research them or hire a professional who can safely install this for you. This is a particularly dangerous part of the circuit breaker panel because the pickups for this device go before the main breaker where you can't shut power off so it is always live. The pickups just click over each incoming hot wire so nothing to disconnect electrically. Other than that, connect the pickups into the transmitter, plug the receiver into an open ethernet port somewhere in the house, and set up your account on the Eyedro website.

The one thing that this device does not do is tell you which device is on by name. You can watch and figure out which devices are on if you watch long enough, in my case a couple days of casual monitoring. Things like the furnace, refrigerators, TV, coffee pot, and many other things are pretty easy to see because they have a unique signature when they turn on and off. Some things like lights are a little harder to tell which light is on, but you can still tell there is one on. From what I gather, the more expensive "smart" systems aren't much better at this at a much higher cost.

The monitoring is internet based, and that part works fine. It would be nice to have direct local monitoring an not have to rely on the cloud, but that is not the way most things work nowadays. I am less worried about this company than some of the startup electrical monitoring companies, but I am always concerned about what happens if a company decides to discontinue supporting a device.

I'm very happy with the eyedro. I bought the wired version, and had to snake an ethernet cable from the router to the basement, but I've heard from their support team that the wireless version works fine in houses (signal can go through walls, multiple floors, etc). I would recommend going wireless to save you the trouble of drilling holes in floors, and running 100' of ethernet, running ethernet through conduits, and stapling the cable to basement ceiling walls. It took me about 2 minutes to install the eyedro, but 2 hours to run an ethernet cable, go wireless.

What I love about the eyedro, is that I can see how much energy the house is using in real time. I can walk around the house turning things on and off, and my phone shows the difference a second later. So, this turns saving energy into a game. Before bed, when I'm checking that all the doors are locked, I also pull up the Eyedro current usage meter on my phone, and check that we're only using the baseline, which is about 200 watts. If its higher than that, that means I've left something on: lights / monitors / computer in the office, lights in the basement. Also, I've been replacing all the lights in the house from incandescents to LEDs, this is a huge and easy was to reducing energy usage. (I buy my lights from IKEA, very well priced). Next, I'm also hunting the house, to try to find "phantom energy" users. i.e. things that draw a load, even though your not really using it, think stereo, vcr, tv, coffee maker. Overnight, my house used a minimum of 170 watts, meaning, once the furnace fan turned off, and the refrigerator took a break, and all the lights were off, things in the house that I'm not using still pulled that much energy. 170 watts of phantom energy, costs about $160/yr at my energy rate, and the eyedro dashboard gives you all of this information in real time reports. You can view the eyedro dashboard from your laptop, or from your phone. It's not a native mobile app, but a mobile website, it works fine. There are a dozen or so reports or dashboards. It gives numbers and graphs, not at all complicated to figure out meaningful events. (i.e. this spike is probably the furnace fan kicking on, this spike is probably the microwave, this spike is the vacuum, this is the lights in this room turning on/off, this the tv).

Also, we took a trip, and I logged in to see how much energy we were using, and we must have left in a hurry, because the house was using 900 watts baseline, oops. If your online gone for a few hours, thats 700 watts extra * 10 hours = 7kw * $0.10/kwh = $0.70 that you paid for nothing, so no big deal if your gone for a short duration, but if you were away for a week, with all that on, then oops. I'm considering adding smart light switches and outlets, that I can turn off remotely. I'm thinking Lutron Caseta for the lights, and Belkin wemo for the outlets. I'm not how long the ROI, from those things would take, but personally, I'd like to save energy. Also, when using energy, is something is a very short duration usage, such as a vacuum for 5 minutes, or a sander for 20 minutes, that doesn't cost much energy in the grand scheme, but things that are always running, such as lights, fridge, furnace fan, office, that's where you'll want to pay attention to usage.

The next thing I have planned for eyedro, is to take a look at how much energy my appliances are using. I could see how much energy the coffee maker uses, the refrigerator uses. Eyedro doesn't have the ability to single out individual appliances, it just measures the whole-house, but, at 8am I started the coffee machine, and it used energy for 2 hours. The refrigerator has all of these cycles, that is pretty much continuous throughout the day. So, I could compare them to newer models that use less energy. Maybe, just pour my coffee into a carafe, or get maker that brews it into a carafe, and then turns off.

Down the road, I'd like to add a solar panel electric system to the house, maybe. Before then, I'd like the house to be efficient with usage, so that I won't have to buy as expensive of a system, and eyedro is helping me to steer that direction.

Also, I was having issues with our internet, and since the eyedro is always uploading data to the cloud, whenever the internet would drop, I got emails that eyedro lost connectivity. Thus, I had data to tell my ISP that the internet had been flaky, and they replaced the modem.

Conclusion: Its a nice toy to show off to others, but it gives you data, that helps you to take action to reduce your usage, to ultimately reduce your electricity bill. Its not just turn off the lights because I said so, but this light is using this much energy, and this is how much its costing us per hour. Lastly, if I were to buy this again, I would spring for the wireless version, save yourself the hassle of running a cable to your basement.

I've had this unit installed, a little less than 48 hours so far and I can already tell that this is an amazingly well designed product that I will enjoy using for years to come!!!

Device Installation:
I only have 50A service to my house (it's an old house). I bought 60A CTs. 200A CTs it comes with are pretty huge. The 60A CTs are itty bitty and EASILY fit into my house's ancient cutoff switch! Installation was a breeze. CT wires are super super long too so it aids in the ease of installation!

Device Setup:
Super easy. Connect and web into the eyedro device, add your wifi details, and done!

Web account:
Make an account and then enter serial number printed on the device on the website, and done!
You can even reverse the CT direction on the site in case you installed one backwards (like I did!) BRILLIANT! Why that reversal feature isn't in all of these devices boggles my mind...

API:
RESTful API. Simple, easy, effective. Wanna know the best part? YOU CAN QUERY THE DEVICE ITSELF! If for some reason Eyedro goes out of business, you aren't left with a useless piece of electronic that tries to phone home and stops working when it can't see the Eyedro servers. You can either use a third party application or write your own (like I did) to query the device and display the relevant info where you need it! (like on my MagicMirror screen)

Web interface:
This interface is gorgeous. I come from efergy which is absolute trash. Eyedro gives you all the data you need, and even splits up your CTs on a beautiful, fast updating graph. It is difficult for me to overstate how much I love the interface on this website. It's relatively clean, TONS of information, and they're all in relatively intuitive areas. Let's face it.. if you're interested in installing whole house power monitoring, you're probably a nerd. This web interface gives you the numbers and stats you want to mega nerd out.

Conclusion:
Want an easy to use API for your own devices (my main use case)? BUY IT
Want to customize the CTs you stick inside your electrical boxes for more accuracy and space limitations? BUY IT
Want a clean and beautiful web interface with TONS of numbers? BUY IT
Want to use this device well after the company Eyedro has died? BUY IT
dOn't cARe AbOuT pOwEr mONItoRiNG? Why are you reading this review???