I bought a wifi iPad 2 today to mess about with as the gf took my 3G iPad 1 on a trip a couple of days ago. I have to say, I didn't think I would be, but I've been blown away by how much easier this is to hold and the general performance of it, it really feels like a vast improvement.
It doesn't feel slippy like the first does when held in one hand, and it doesn't feel nearly as weighty. I don't know whether that's down to the reduced girth or not, but it feels much more comfortable to hold overall.
I'm very impressed, going to go back and grab the 3G model tomorrow and punt the iPad 1.