Got mine in the mail today.
First thing I said when I opened the box was "damn it's huge". that's what she said
Second thing I said was "damn it's light". I was worried that I wasn't going to be happy with the way it felt since it's plastic, where my nexus one had a metal frame, but so far I can't really tell the difference. It doesn't feel huge in my hand, it feels good.
Right now I'm just fucking with it, trying out and learning the new features of ICS. It's going to take a little bit of getting used to, with things like the app drawer no longer scrolling up and down, but sideways, and hardware changes, with the power button being on the side and no more capacitive buttons. I prefer the power button on the side, it's right where your thumb or index finger is.
Right away I noticed that the facebook app isn't too compatible with ICS yet so my contact pictures aren't syncing. Digging the new Email app though.
So first impressions are it's pretty fucking badass. I'm sure I'll have more to say.