Perfect!
As I don't have close access to an ethernet socket, I used to use an internal wifi network card, with all the problems that entails, namely: dubious efficiency and lower throughput, frequent hardware instability, and consequently a shaky connection, but also incompatibility with types of wifi signal that are too recent...
So I decided to get this MSI wifi key. It takes just a few seconds to install, and then it's off to high speed, reliable, stable, with virtually no drop-outs, and if there are any it's never long enough for you to lose the connection, but while playing online.
So I can highly recommend this usb wifi stick, which is just what I wanted!