It's basically Modern Warfare reskinned, which although not necessarily a bad thing. Does feel lacking.
Updates seem to occur every couple of days although bugs don't seem to be getting fixed.
Most recent update has resulted in mine crashing constantly to the point of being unplayable (yes, I've updated drivers etc and have a high spec PC).
There has been a very clear lack of QA reviews done on this game as shown by simple things such as camo unlock challenges requiring items several levels higher than the camo unlock or items that don't even actually exist in the game at all.
Overall, not a bad FPS, but also not a particularly good one, seems to be a trend of games this year.