It's a nice-looking, slick camera, and we had high hopes that it would provide some peace of mind when we're traveling, to help keep an eye on the wood stove, and to check in on the pooches, etc. Unfortunately, the camera would never connect to our wifi network"”basically, the camera seemed unable to scan the QR code on the Yi app, so the installation process failed every time. (We've got plenty of devices connected to our network and have never had connection problems.) The Yi setup process is completely automated and doesn't provide any error messages or status info, making it very difficult to troubleshoot.

Yi Support was polite and responsive but didn't have any real answers or expert knowledge: eventually, after several back-and-forth exchanges, they sent another, identical camera which had the exact same problem, and that was all they could offer in terms of a solution. Finally, we decided to give up and cancel the order for a full refund.

(Note: the Yi Support site does have a "Forum" section, but it was overwhelmed with spam posts due to little-or-no forum moderation, apparently. Not a good sign!)

I have to say, I am blown away by this camera. For the price, there is no better camera. I paid $50 with a 15% off button, but even at the normal price of $59, this is a steal.
The picture quality (day and night) is excellent and the build quality is outstanding. You can see the specs on this camera in the listing, and it has every function I could want in an indoor security camera (Full HD, IR night vision, pan & tilt, two way audio, motion detection and tracking, etc). The app excellent. It is simple but fully functional and easy to use. This thing does it all and it does it for a fraction of the price of the competitors.
I am planning to buy several more of these for around the house. This is an incredible camera at a budget price. You will not be able to beat this value!

I'm in love with this camera. I believe I read somewhere that it wouldn't work in cold temperatures. Well here in Alaska it recently got 25 below zero degrees Fahrenheit. The camera still functioned properly. I love it. Best security camera. I'll only buy YI.

I love this camera! It does everything we wanted it to. Grandpa is in assisted living and we can watch him day and night. We can even talk to him and remind him to stay in bed or tell him that will be late for a visit. Sometimes the sound that I hear on my smartphone is not the greatest quality but what he hears in his room is perfect. I love that we can watch him and I love that the staff know that we can be watching them day or night. One feature that I wish was different is that that app cannot be open with any others on my phone. I've thought about having a separate phone just as the monitor for the camera. It is worth every penny!! I bought my second one just today!!

Bought two of these cameras, one to keep an eye on my back deck and patio door and the other to keep an eye on my basement. Although it only supports the 2.4 GHz WiFi band (keep this in mind during setup -- if you set up using a 5GHz connection on your smartphone, it will fail. You need to connect your phone specifically to the 2.4GHz band on your router), the video feed is high quality at about 25KB/sec with about a three second delay. You can zoom up to 8x (digital, not optical) to magnify certain spots.

The live feed allows you to have controlled one-way or two-way conversations through the speaker/microphone. You can wither subscribe to the YI Technologies cloud storage service or you can record and access video/photo feeds from an optional 64GB micro-SD card you insert into the back of the unit.

I was fortunate to read some earlier reviews! NOTE: this unit will not work right out of the box -- unless YI Technologies has updated the firmware on their factory units. Instead, you will need to download the latest firmware from the YI Technologies site to a micro-SD card (usually inserted into an SD card adapter) on your computer, rename the download file per the site's instructions, then pull and insert the micro-SD card into the back of the unit to upgrade the firmware. Once the latest firmware has been installed, the rest of the setup is pretty much plug and play. The firmware process added about 30-45 minutes to the process that otherwise would have taken about five minutes.

In conclusion: great product, very reasonable price. Invest in a 64GB micro-SD card for each unit. Download and install the latest firmware from the YI site, following their instructions. Make sure you set up the unit with your smartphone connected to the 2.4GHz bandwidth if you have a dual bandwidth router (2.4 and 5GHz). Once set up, your router will automatically take care of the 2.4GHz/5GHz translations so you don't need to switch your smartphone every time; this is just a setup requirement that is typical for most/all of these types of devices (including video doorbells) since 2.4GHz maintains a stronger signal over a longer distance from the router than does the 5GHz bandwidth (as of this writing).

The unit can be set on a table or you can use the separate mounting plate to attach the unit to a wall or ceiling. You'll just need to have access to a power source. So, if you have a drop ceiling, you can attach the mounting plate, purchase a long USB-to-micro-USB cable to run to your power source (the unit comes with a 110-volt to USB power adapter) and you can get a full field of vision of your surveillance area.

The smartphone app is excellent and pretty intuitive to use. With it you can add cameras to your suite, switch to different cameras for live view, set up detection rules for each camera, and access any feed history based on the notification rules you set up, including motion detection. If you use a memory card, the history record will overwrite the oldest entries once the card is full.