I got them when they launched. They work surprisingly well. They stick to the iPad very well. They have a nice resistance to them and spring back to the center. They work very well on duel stick shooters and several game loft games.
I'm sort of interested in these, but then it's another thing to carry and I don't really have any issues playing dual-stick shooters on iOS devices anyway. They seem to translate well to the touchscreen. I'm sure this is better, but I'm not sure it's worth the price and bother.