I'm really enjoying it, game looks and sounds slick. The only complaint you'll hear from most who've played it is the handling, but actually you just need to tweak the settings a bit before it feels normal again. The Career is laid out more like an F1 season which is a nice change, so you have contracts, sponsorships, team-mates, assigned cars to events etc.
If you end up playing it, I can help you with the MP achievements! xD