Now if you are one of those people still making your mind up weather to buy the game ( like myself) here's a few pros

The guns look like cod 4 guns - I think this is good because cod 4 had the best variety of balanced weapons
The maps look like cod 5 maps - feel free to disagree but when I have been watching trailers some of the maps look like cod 5 maps like battery, airfield! Hanger, makin, roundhouse, Upheavel. And I personally loved every map in cod 5
The graphics and gameplay look like mw2 - now some may not like this, but the feel of the game is what kept me into mw2.
Title and Emblems are back!!! - don't get me wrong I did like customising my own emblem but I also loved the challenge to unlock every title and emblem in mw2 which also kept me hooked onto this game.
It's nothing like black ops - now I'm not hating on treyarch, they are very creative and did make cod 5 and that was an amazing game, I just think black ops is the worst of all call of duty's because they may have tried too hard but I'm glad mw3 is nothing like it

Please feel free to comment, disagree, flame if you must

-Skidzzz