I am very pleased with this wifi adapter. I chose this one because it was the highest rated on Amazon at the time of purchase. Installation was simple, and my download and upload speeds have nearly tripled.
My desktop PC had an internal wifi adapter plugged into the motherboard, which is now 8 years old. The adapter wasn't capable of 5 Ghz or newer encryption technologies and I was running into trouble connecting to my Comcast wireless gateway at home. My download speed was 28 Mbps and upload was 5. I purchased this USB network adapter to resolve my issues, and it was a success.
To install the driver and utility, run the installation disk first before you plug in the USB. Note the instruction pamphlet says to plug the USB in first, but a separate piece of paper was included in the box that specifically corrects that and states to run the disk first. If you have an old network adapter in your computer, also disable that adapter before trying to connect with the new one.
When I first plugged in the USB wifi adapter, I ran an internet speed test (Ookla) and was only getting 2 Mbps down and 3 up, despite the USB utility software saying my signal and link were 100%. Something was obviously wrong, so I tried plugging the USB adapter into a different USB port and that did the trick. All of my USB ports are 2.0, but I heard that some ports provide more power than others, so if you run into a similar issue, try another port first.
My internet download speed is now 94 Mbps and upload is 12 Mbps (note this is on 5 Ghz channel instead of the 2.4). I am very happy with this product.