I played with it not too long ago, but only for a few moments.
Very fast - smooth too. But, at 7", thats a much smaller screen for the CPU and GPU to drive, so, I'd expect that.
The UI, well, you all know.. come on, already.. they should have just licensed WebOS from HP and they would have had an easier time of it.. (being sarcastic here).
The power button is just downright wierd - you can't find it to turn it off/on, and there's no feedback when you do.. that was a cluster---- of a design, if you ask me.
But, overall, this was a really cool device. Overpriced for sure, and without the essential apps like email, it really wasn't ready for prime-time, YET.
RIM has lots of cash. They promised to roll out the missing apps this summer (PhoneDiva), and, perhaps, just perhaps, then they can make a serious marketting run - but, they'd have to definitely reduce thier price - at 7", its just not going to sell when you can get a 9.7" for the same money.