I had a good play with one of these today, aaaaaaaaand.....
I really like it. Very nicely designed, great camera (the first I've seen that can stand up to the iPhone 4). It didn't seem that snappy but that was probably because people had buggered it up messing about with it
Pity its not dual core as it would have really put Sony top of the Android pile for a short while at least. I still think the SGS2 is a better option if you can afford it (unless of course its rubbish, but statistically it should be great)