Not just the same game with polished graphics (unlike GTA Trilogy). It's a new game that tells the same story again, but has got new graphics, mechanics a bit changed. Doesn't seem to have any annoying bugs too.
I'm just joining the action of balancing. I haven't played it. I'm sure I will. I suppose I'd rate it 5 stars anyway. I surely disagree with rating the game just for the price of it... and it's not even expensive for a game nowadays.