My wife has an H3 Alpha with the V8, a friend of mine has the H3T with the 5 Cylinder (i think) he loves it, and it's pretty cool in person, although I've never driven it. Lauri's H3 with V8 is much snappier than my H2 6.0, but I have to tell you, the H3 is not really made for full grown people. She fits in it fine, but I like my H2 MUCH better because of the room. The other thing about the H3's that I don't like is how low the top seems when you're trying to look out the side window. Of course, I'm 6'4" so that's more of a probelm for me than it is for Lauri...
Anyway, them's my thoughts on Hummer after owning two fo them for a couple of years.