I really enjoyed this game. Milestone have done some great racing games over the years, the classic Screamer series, SBK, WRC, MotoGP. They know there stuff!
Spiritually, and visually even, this is very much like the classic TOCA games - before they became all arcadey and dropped the TOCA name for Race Driver.
The track surface is really nice, and constantly changes throughout the race, skid marks, tyre rubber build up, even in the wet the track gradually dries in the high friction/racing line areas. It's something I've only ever seen in Milestones games. Really adds to the sense of realism. I noticed several tracks I've never actually seen in other racing games, which is always good. It's nice to play familiar and famous tracks, but new and lesser known tracks add to the longevity.
My only minor crit, is the cockpit view could have done with a tad more visual polish, but it's a nice addition, as not all racing games include a cockpit view.
In short, if your a fan of Milestones other games this won't disappoint. Old TOCA fans will love it to!