I have had my fair share of shitty usb wireless ac cards on my pc. Both usb and pcie, they all degrade after a month and act like a 1990s piece of hardware. Finally I found the intel 7260AC pcie card which is in my PC right now and works flawlessly. At first I could not believe it, I did tons of stress testing and it managed to hold up. Im guessing you want a usb adaptor though. My advice is to just buy the 7260ac card and put it in your laptop. Its SOO much better than usb. If your using a desktop, pcie if you have a free slot. Good Luck