Top positive review
Pretty good (and does the job) but I'm looking for better.
on 14 August 2017
I bought this to connect to a very weak BT Openzone Wifi signal. My laptop's internal adapter could only see 5 local networks and BT wasn't one of them.
Using the TL-WN822N, I can now see 15 local networks incl. BT Wifi, though that is a weak signal. I'm receiving it on channel 11 and suspect there is interference from my next door neighbour who is blasting out his Wifi signal on channel 11.
Unfortunately, because it is still a weak signal, I do get variable speed ( 0.25Mbps to 6Mbps ). I suspect that is due to the BT Home Hub (or other load / environmental (eg microwave oven) factors) that I'm connecting to, rather than the TL-WN822N because whatever speed I get, it stays that speed for a while.
I also tried the "TP-LINK Archer T4UH AC1200 High Gain Wireless Dual Band USB Adapter - White", hoping it would give even better results. It didn't. The T4UH AC1200 could barely detect the BT Wifi signal and I couldn't connect at all. Though it can still see many more networks than my internal card.
I'm sending the T4UH version back and I'll either buy another TL-WN822N (for my wife) or try a different mfr. and look for higher sensitivity and gain. Unfortunately, these figures are not easy to get from Amazon's site or even the manufacturers. tp-link.com gives WN822N antenna gain as 3dBi but doesn't give a figure for the T4UH !
Another thing to note is that the WN822N comes with a reasonably flexible 1.5m USB 2 cable, whereas the T4UH is a thicker, less flexible, 1m USB 3 cable - not quite as easy to position.