Summary: I read almost, if not all, the customer reviews before purchasing this game. Now keep in mind that it is my first F1 game ever, and the first one by Codemasters as well. As far as the game goes, I love it. I have already completed a season and I thoroughly enjoyed the experience. Now that's not to say that there isn't a large learning curve, or at least for me there was. I am used to the Forza series with the exception of Forza Horizon.
Summary: I got this game for well under $20 shipped to my home. The game was in "like new" condition and the VIP online code was included. The game is so amazing! I was hesitant because F1 2013 is just hitting stores now, but it's not worth $40 more than 2012. Maybe, if Code Masters had included all of the Classic content for $60, I might could justify it. But they didn't, and they are missing Ayrton Senna.
Summary: The game arrived in excellent conditions. I am a F1 fan from about 13 years, and have enjoyed this game a lot. The transition from dry weather to wet weather is huge, and the game demands your focus in every inch of the circuit, like I assume it is in real live. It is a difficult and so much precision game, so for gamers that like a more arcade approach, this is not your game.
Summary: I haven't yet bought this game from Amazon.But, played the demo version which in itself feels like a never ending quest. This game is so vastly different from all other racing games out there. When compared to games like Forza,NFS or G.Turismo, F1 2012 is like light years ahead in terms of the realistic experience and required skill level to crack it.
Summary: The promise of dynamic weather turned into "It will rain on every race" lol. CM tried to patch it and in the process of all the patching they changed things that didn't need changing and left the bad stuff alone. The game still has bugs galore like the incredibly annoying penalty system that waves a flag at you when you bump another driver but AI can demolition derby their way around you without getting black flagged.
Summary: I bought this for my spouse who has played the earlier version, he loves it and enjoys the new features. Sorry I don't have more technical info on what's new/different. For those who enjoyed previous F1 games, it seems like a winner. Much better pricing on Amazon than brick and mortar stores, received quickly, easy ordering process.