Had / have also one of Buffalo but it was comparatively very cryptic!
Works fine!
Can be powered via USB, which is handy, since no additional plug must in the box provided USB is still free either ...
But it is also possible to connect to the power grid.
I do this because I want to (Wake On LAN) WOL do so. Since the WLAN is not (so easy) is concerned, I have the adapter.
So everything is on the computer as if it were on the LAN and WOL is not a problem even though he is involved in wireless!
A great device!