I've been using it for a couple hours. I have been using Firefox, so that's what I'm basing this off of:
pros:
Small and compact, so huge screen.
The new tab page. It's pretty much perfect. Top visited sites, most recent bookmarks, AND recently closed tabs.
Runs each tab separate. I haven't had it crash yet, but at least when it does it won't kill all the tabs.
Application shortcuts. GMail right on my desktop, with a nifty icon to go with it.
Dynamic tabs.
Cons:
No spell checker.
No auto check for GMail (an add-on I have for FF)
Bookmarks are a bit harder to access, you have to see the whole bar to go through them.