i just bought it. even though without crash mode, there's still plenty to do. i suggest you buy it unless you're not planning to play online or the type the gets bored seeing cars get mangled
I played the demo a lot, and I really liked it. I'm definitely buying it, although I never played any BurnOut game before.
Just buy it. It's one of the best damn game for xbox and this is coming from someone who HATES racers...