I use this wireless adapter to my Raspberry Pi 2 under OpenELEC Kodi. The device is very easy to understand and also as a layman. The connection is great and so far I could not detect any faults or disconnections. The stick firmly into the USB socket. Only downside is that the shape is quite uneven, thus a mini USB stick fits right just over the wireless adapter. Nett here is the included USB to USB adapter to resolve this issue. But I personally would like to do without this.
But in spite of everything: A very good adapter and recommended for the price! I'll probably buy myself some more of these adapters.