Don't listen to trolls! With a great and epic story plus the multiplayer that we know and love this is a must buy!
Pros:
-Great voice acting
-Great overall epic campaign that will keep you glued to your TV
-Variety of guns to use and level up
-Story is fairly easy to follow
-Survival mode adds a great twist and is great to play with a friend
-Fun new maps
Cons:
-Not much has changed in the multiplayer aspect of the game aside from a few new unpopular modes
-Matchmaking is not optimal (some games you will be breezing by killing tons of noobs and in others you will be dominated by players of a much higher skill level)
Summary:
Many of the bad reviews are crap in my mind because people are just comparing it to earlier games in the series. I look at it as a great game in itself but when compared to the series not that much has changed. Overall I believe this is still the best so far in the series and has still exceeded my expectations