My wife just brought me home a copy of the Godfather for Xbox (I am so loved).
I've played it for about an hour, and I have to say I am impressed enough to write about it.
The game looks and feels like a GTA game. The controls are a little different. Third person view with movable camera angles. Huge city to play in (NYC), both on foot and in cars. A wide selection of weapons, plus a pretty neat melee system.
The city is incredible. I haven't explored it in depth, but the graphics are nice. It really captures the feel from the movie.
As I am not far into the game, I don't know how well it stick's to the movie plot, but so far, I've seen some characters I know, and the glimpse of the Godfather is dead on. I don't know if Brando actually did the voices for the game, but you would think so by the sound of it.
I guess I still have a lot to learn before I give it a thorough review; story line, playability, challenge, replay value, etc. But from first impressions, it looks awesome and what I hoped it would be.