I bought this after thoroughly enjoying Quantum of Solace. But personally I dont think this was much of a step up.
The Graffics were pretty poor like a good quality PS2 game, Game only consists of 5 levels very short, It took me less than 5 hours to complete it on Agent setting.
Online is a little shoddy, i felt it was based on Call Of Duty but extremely poorly. Main Flaw with online - melee a guy and then within 5 seconds he's alive and meleed you and then you both die. Sooo annoying!
But the storyline was good and so was the single player gameplay.
Hope this helped