Real next-gen title ! Limited MP!
SP is short but very intensive and it does keep you going all the time until very end. MP for the other hand is in my opinion a bit limited as it does support only 8 players and very few players are playing it as a team (most idiots just run around and shoot like "Quake" kind of a game which makes MP very bad experience). When you find a good team the game does change dramatically - it is designed to be played as a team not just four individuals!
It does get hard on Hardcore but this way it does last for longer and is more challanging.
Most of all the game lacks any seriuos flaws - everything is good or better than that which makes the game great experience and value. If you like actions games you can not miss this one, a MUST HAVE!
btw. If you seriuosly want play it MP look for a clan... I am just looking for one myself.