Single player campaign mode was about as short as it gets for a FPS, but it was also about as varied as it gets with virtually no design repetition between levels.
I haven't played co-op campaign, so I don't know if this compensates or if it's just the same campaign with two player simultaneous play.
Plotwise, it was better than KZ2 (not saying much as it was a basic "invasion story") but not as indepth as KZ1. The scale of the story ramped up in the later levels leading into an inconclusive ending that is presumably leading into the climax in KZ4.
Visually it is also about as good as it gets for any FPS that isn't Crysis playing on the appropriate hardware set up. Hardly perfect, but I don't see how many could even say it looks great "for a console game" considering most PC FPS games aren't on par, regardless of settings/hardware build.
Controls were tweaked appropriately to address the gripes over KZ2 and it generally feels lighter and more responsive.
I'll have to do a complete run through with Move for a legit opinion, but my initial impression was that it didn't make the game more natural to play as I felt it should have.
I didn't note any huge difference with the online mode over KZ2, but admittedly, I just don't play these games much online before moving on to something else. Botzone was a nice addition for offline familiarization with the maps and is something all FPS games would benefit from.
