I run several of these adapters on my Raspberry Pis. The adapter is detected by the current Raspbian immediately without additional configuration and can be set up using the pre-installed wireless tools immediately. A few problems I had in connection with a wireless keyboard / mouse combo that works on 2.4 GHz - this forced me regularly the WLAN connection to its knees. However, this behavior could be completely eliminated by a channel change my wireless access points.