My friend has one! It is SOOO cute!
But it drives me insane when I try to type on it. But I think it's just one of those things you have to get used to. He doesn't have any problems on it.
The only thing is that since it's so small it's really easy to have it stolen. I've heard of a couple that have been stolen, including his (though it was returned...pretty crazy story, anyway). But as long as you're careful with it and you can handle typing on a really tiny board, I think it's awesome!