I may be one of the few people who didn't think this game was the second coming.
I really found the game to be strikingly average. Graphics were good, the control was good, the concept and "missions" in the game were good. The game was linear, but that was fine. But, there was nothing to me that made it stand out from the pack. No one thing in it made this game stand out (and personally, I'm getting sick of stealth in games. For the games that specialized in it (MGS, Splinter Cell) it works really well. But, I don't want to see it in every game, and it just seemed like it wasn't really needed here.
That being said, for the price it is now, its well worth it. I got the game for $8, and I've never regretted the purchase. I just see why gamers haven't neccessarily flocked to this like they have other games.