spent all night on this - wow! absolutly awesome.
didnt play the first as it was out long before i got my ps3 so i dont know what extra features are in it but i love it!
story mode is good, team based commands work more often than not, the customisation of your character is awesome, hell, you can even take a photo with your eyetoy and put it on as the face
online play i havent delved into much yet, only to do the terrorist hunt which is upto 4 people eliminating all terrorists in a small environment - the match itself is very cool but the loby system to join a game gan get a bit annoying as by the time the list refreshes, half of the 3/4 player lobbys are filled - but a minor inconvienience.
cant say how long the campaign is as im playing terrorist hunt for a while then am going to finish it but i well reccomend it