I bought this solely for use on my Android phones with the Wiimote Controller app. It worked perfectly and is a great buy if you can still get them (they were pretty hard to get hold of back when I bought it).
Sadly, it no longer gets use as I can now use my PS3 controller instead (and wiimote connectivity doesn't work with the SGS2).
Buy it if you can, it's far better than fiddling about with a wiimote/classic controller attachment as this doesn't need the wiimote, the bluetooth is built in!
