The only way this game could've scored so high is if people were more excited about a new console than in a new game.
Gameplay:
Let me start with the good stuff. This game has some really awesome weapons. I was definitely impressed with the quantity and diversity of the guns available. In addition, each weapon has 1 or 2 alternative functions which adds value to each. In fact, nothing is more satisfying than using the secondary fire on the rocket, which allows you to fly your rocket into your enemy's face.
Unfortunately, the rest of the game is lacking in every single department. At best you can call this game "uninspired," or a total mess. It plays like a sad attempt at rushing out a next-gen game with a bunch of "nothing new."
For example: the game features a cover system reminiscent of Gears of War, but much much (much) worse. You cannot slide along your cover to get a better viewpoint, it is sometimes difficult to enter and/or exit the cover, etc. The AI in the game is pathetic. The level design is horrendous. And the levels themselves are just not fun. What's the point of having stealth missions if you have to eventually break your cover and kill everyone to advance anyways? And don't even get me started on the non-existent "checkpoint" system. If you make the slightest mistake, you have to restart the mission in order for the game to track your mission stats.
All in all, this game is pathetic in the gameplay department. It isn't fun and it is frustrating. I think people were just too excited that this was one of the first 360 games.
Graphics:
You can sum it up in one word: uninspired. The levels are bland and predictable. Maps are often too large. Overall the game looks like a regular Xbox title. You will be treated to the occasional cinematic that will remind you this is a 360 game--but you wouldn't know it from playing the game.
Value:
I find little value in this pathetic title. The multiplayer modes can be fun--but only when you can play with real people. The maps are massive and intended for very large teams--which means that most matches are currently filled with several bots. Depending on the match settings, these bots range from ragingly retarded to god-like. Neither is very fun.
The main value here is the weapons. The variety in guns and secondary fire modes can make this game. But everything else is so poorly done there is little I can say positive about this game.
I wouldn't even recommend that you rent this game. Play a friend's copy so you don't have to waste any of your money.