Well I can say that there were moments that I was amazed and moments that were too easy. Without giving the good all the way up, I'll wait for a little while before giving the whole impression. Each level was a mini frenzy. All in all, the whole story is something you'd expect from bad writers.

5 hours 21 minutes on regular is not bad given the intensity. I even had time to look around some levels and the graphics are a bit better than MW. There was only one part where you had to "hold off the onslaught" for x minutes, and it was tolerable. The only thing that kinda sucked is that I died at a point where baddies were coming into the house, and with the minimum health I respawn with, and them trying to blow up my DST thing, I spent more time dying and them blowing it up than I spent on any other sequence of the game.

The amount of weapons to use in the game was great. They're lying all over the place too. The effect of thermal sniper rifles is neat. EMP.. cool. 

Overall, I think that the single player is still the best part of the COD experience. MP here is decent, but the pings are wayyyy too high. Terrible.
So here's a treat for you. I won't ruin the ending, but here's a souvenir.