Summary: First, the background. I played Forza Motorsport 1 and Forza Motorsport 2 (FM1 and FM2) on Xbox 360 using the multi-screen capability. I have 3 Xbox 360's linked on my LAN and connected to 3 HDTVs to provide a three screen wide view of the road and car.
Summary: The Single Player experience is phenomenal. Easily the best racing game I've ever played. The Multiplayer is absolutely atrocious. They removed everything great from Forza 2, and there is no matchmaking for any classes below 'A.
Summary: While it's true the game has seen visual improvements, new tracks, and new cars, the longest-lasting feature that a significant number of players of Forza Motorsports 2 enjoyed, the custom online play, has been dramatically changed.