Summary: I am very satisfied with this game. I've had it for a few years and it's still really entertaining. I don't mean to spoil anything, but after you do the basic tutorial, you get thrown in a massive, and I mean, MASSIVE battle. Buildings are blown up, all you hear is gunfire and explosions, and my reaction to this the first time I played was "woah". The campaign is very fun since the levels take a good length of time to complete and show a good difficulty.
Summary: This was a fun game to go back and play. There is some glitches that are somewhat of a annoyance but doesn't affect the gameplay too much. The thing that was a disappointment for me was the checkpoints, on veteran I found that you will have to do the same thing over and over again at the harder points in the game because of the lack of checkpoints in some missions. But if you like CoD and haven't tried it yet I suggest you do.