Mafia II much
Not really, it's totally different
I played the game for a while and I have to say it's a lot of fun, if I ignore the things Cromiell mentioned. Also I've read somewhere the gameplay takes around 30 hours, maybe more so that's another plus. Not many games are that long.
In my opinion it's one of the best games of this year even when it's laggy.
You're right Crom, the consoles fuck PC games up, let's hope it won't be forever like that.