I got the Limited Edition yesterday and I've been playing the game pretty hard since.
It certainly feels like Forza, there's no surprises. It's is improved over Forza 1 but not amazingly so.
I'm annoyed you can't fully customise the controller layout. Left handed players will feel let down and I really don't understand why developers don't let you change the layout the way the player wants. Still, at least the advanced settings are a nice touch.
I don't like how the cars look. It's like they're covered in clingfilm and they're too dark against the environment. You could'nt accidentally mistake them for real cars if you saw them out of the corner of your eye.
Sounds great though and uses 5.1 well. The Nurb looks pretty good, better than in Forza 1 and the GUI is easy to navigate. The car customisation is better and easier though I doubt I'll personally do that much. But I know it floats a few boats.
Ultimately though it feels like Forza. Too much oversteer (until you tune up) and too much sliding but a fine racer all the same. Glad I got it.