Gamespot overly harsh
Even with a spotty AI the game isnt about the single player maps (although I found them enjoyable and a nice introduction to the game mechanics) its the multi. The game was made by some old Bungie guys so the maps are great as are the matchmaking. It is very smooth with no online hitches at all which is something you cant say for recent Arcade games that got a lot more press (ahem Castle Crasher anyone?).
Anyway, try the game is the best original arcade game of 2008 in my opinion, lowly as it may be.
See developer support and feed back here. Nice guys who will listen. http://forums.xbox.com/23486677/ShowPost.aspx