Amen to that.
The start of this game is pretty slow. Also, you'll want to run the graphics on "custom" settings, because the default "high" is just ugly. It looks great on "custom" with fullscreen AA and the other good stuff.
The closed-in interiors you start off in are a horrible first impression, I admit. But with some patience... It is a truely great game. Don't compare it to a "I want to be a real boy" GTA IV and it'll be great.
I agree with you. A friend of mine bought this, and I though he'd finally lost his marbles. I see no reason to play this game, as we already have GTA IV, which is infinitely better.