Unit appears to be of a sturdy, high-quality, construction. Works great and the range is very good, am getting a high speed connection at the farthest point in the house from the router. On my Windows 7 machine I initially had problems with it randomly disconnecting and needing to periodically re-set the adapter, but figured out that by:

1. In Windows Power Options, under Power Saving Mode, set Wireless adapter to "Maximum Performance"
2. In Windows Power Options, under USB settings, set the USB Selective Suspend Setting to "Disabled"
3. In Device Manager, under Network Adapters, right click on the Realtek adapter, then properties, then Power Management and then UNCHECK the box that says "Allow the computer to turn off this device to save power."

With those three steps it will stay connected indefinitely - no problems. Not sure why the instructions provided with the unit don't give you these instructions; from other reviews it seems that many people are frustrated by the unit constantly disconnecting.

Running Windows 10 Home 64 bit, this worked fine for a couple of weeks - it just plugged in and worked. After I upgraded my system to Windows 10 Pro 64 bit it stopped working, no matter what I did - I downloaded and installed latest Win10 driver, and it immediately started working again - I am very happy with it (and my other BrosTrend purchase) and would recommend the product and the company behind it - certainly I would buy this brand again (I have two of these AC 3 adapters now)

I purchased this BrosTrend adapter after my 5-year-old 5db 300Mpbs stand-alone adapter fried itself when I stupidly unscrewed it's antenna while it was operating ($60 lesson learned - don't ever unscrew an antenna whilst your adapter is plugged in!) - I don't get any faster speed using my new adapter than my old adapter (my current router is a few years old) but I have acquired newer technology should I need to upgrade my router in the future for a very good price (I think the trick is to make sure your adapter can handle the fastest speed your router can provide - at the best price - and make sure you are not paying similar money for less impressive technology)

I think spending a bit extra for an adapter with high gain antennas is a worthwhile investment as I definitely see big speed gains (about 2x) over a standard 300-600 Mpbs USB dongle adapter without a protruding antenna on my system

Alright, so at first the drivers on brostrend site were outdated, I found the latest drivers for the Realtek 8812au chip (which this adapter uses) on

Realtek's official website. After updating to latest drivers operation was smoother and less abnormal. I am using a 25ft USB extension cord.

At first I was frustrated it didn't seem I was getting any improved connection. After adjusting the "Beam" settings in the wireless adapter properties in

the windows device manager . I able to get 4 out of 5 bars at 325 Mega(bits). NOTE: The wireless source is unknown I'm using xfinitywifi.

This thing is amazing! Before now, my only option for internet was hoping that my aging laptop's onboard wireless could reach all the way across the house to get a decent signal. My download speeds were around 1-2 MB/s when all other devices got much, much better speeds. All I had to do was plug in this adapter and download the latest driver from the website. Now my download speeds are 8+ MB/s at this distance, and I have a steady connection while playing online games. I plan to update my review later if any of this changes, but for >$30, I can't really complain!

UPDATE: After using this for several days as a replacement for my laptop's onboard Wi-Fi card, I have begun to have several annoying issues. The biggest issue is the signal just dropping out at random. I've verified that the router itself isn't dropping the signals by using other devices and switching back to the onboard Wi-Fi receiver on my computer. The signal will be excellent (max bars) one second, then it will drop out entirely and the device will not pick up any other Wi-Fi signals for several minutes unless I go into Windows settings and reset it. Even then, it's started dropping the signal seconds after the reset. This is all on the latest driver on the BrosTrend/TrendTech website was installed. I've tried disabling my onboard adapter, leaving it on, and various other fixes, but nothing seems to help the problem anymore. If this keeps up, I'm going to return it.

Something is legitimately wrong with this product. After many network monitoring tests, I have concluded that only one of these antenna adapters actually works. Both antennas are fine, but only one plug is active. This might not be that big of a deal if it wasn't for the fact that the single antenna port that works, has a horrible signal. It's about 3x worse than my laptops built in wifi card. Less than ten ft away from my router, yields a signal strength of 90db + (no matter what orientation of the 1 working antenna port). Switching over to my built in wifi card, shows a signal strength of 25db in same location. For reference, I did update the drivers on Windows 10. I've also tried this adapter on two Windows 10 computers with the exact same results. Maybe I got a lemon or something, but for this kind of product to pass quality control, should make anyone think twice about purchasing. My 10 year old (54mbps) adapter (no external antenna's) easily gets better signal strength and more networks. Returning promptly, it's a really horrible product..

Edit: I've run a few more tests. I'm within 3 feet of my router right now, and the signal strength is, at best, 74 db. I think this device is causing destructive interference wifi patterns on itself. It's the only thing that makes any sense. I'd love to open it up and see if I can fix it with a quick solder, but I want my 25 bucks back.

EDIT: Bought a second one 2 months after initial review and can say with 100% certainty that the right antenna connection on both units only SLIGHTLY enhances 5GHz signal (comparing to using w/ no antenna). The left antenna, increases both 2.4 and 5GHz bands, while the right antenna connector shows absolutely no 2.4GHz bands whatsoever (aside from being 3 feet away from a 2.4GHz router.. This must be a mass manufactured defect in either all, a particular batch, or (even worse) by design. It's hard to believe that 2 units purchased months apart would have been from the same batch... I suggest that if you do own this product, to test connection signal strength with only one antenna connected to the right side port and report in your reviews/comment here if you observe the same results. I'll attach images to show the data on signal strength with all combinations of possible antenna configurations (i.e. no antenna - left only - right only - both).

I've tested the individual antenna that came with this, separately on a a Panda wifi adapter. Surprisingly, they are very good antennas when used with another adapter. The main body is messed up in these and can't utilize the antennas power. I took apart on of the antenna and can verify that the actual antenna (internals) are build correctly and with good quality.

My suggestion from this though, is to just go with the Panda Wireless PAU09 N600 Dual Band. The Panda unit works really well. Plus it works with Kali Linux.

I took an hour combining tests for this review because I have come to hate this product and the company who makes them (I gave them a chance, but decided to keep the defective unit(s) and throw them a hard up middle-finger).. After contacting support to inform them of a dead-on-arrival product(purchase #1), they requested that I pay to ship it back to them, and then wait 2-4 weeks for a replacement to be sent from China. WTF is up with that??? Their idea of this situation is that a customer is supposed to pay for a problem the company should bear 100% responsibility for. Anyways screw this company and this product. Let the data speak for itself. Here's the product you should buy though:

https://www.amazon.com/dp/B01LY35HGO/ref=cm_cr_ryp_prd_ttl_sol_1