I've waited all this time for THIS?! Forget about it.
I now know that he must not have played very much of the game, because it gets old FAST. The introductory level is great. It sets up the story and the core game play mechanics (save for your bladed frisbee). This game looks amazing and the sound/ acting is brilliant.
Now, that being said, once you get your special disc of death that becomes your main weapon throughout the game. Sure, you can use standard gun...but beyond a pistol there's really not much more you can use (unless you want to shell out the money to buy a gun that doesn't have that Anti-Virus thing on it.)
My advice (even though you probably don't care all that much) rent it. If you like swinging around a glaive (or throwing it, even though it has a range of like...two and a half meters) and neutral coloured environments...rent it until you're sick of it. I can't recommend buying this game since it has almost no replay value.
I didn't even TRY the multiplayer, I was too busy playing Halo 3. My friend, on the other hand, HAS played the multiplayer, and he HATED it.
But, if you really want to buy this game...then go waste sixty bucks...no skin off my nose.