Well what can I say...
Most people will buy this game for online, stick to Modern Warfare. This is the worst online installment of the series I have played. Bland maps, bland game play, and as a Hardcore player you seem to be punished as only given 4 game modes to play.
The only good thing I've pulled from the online experience is the fact you can now fully customize your class, enabling the chance to have up to 6 perks but with only 10 slots available it makes you think about what to use carefully.
The scorestreak idea is 'OK' but killstreaks make a lot more sense.
The story mode itself is quite a disappointment. Maybe this is why if a team splits up when producing games, the weaker of the 2 should just start a new game instead of using Modern Warfare's model but ruining the brand name.
I must admit I am looking forward to the next installment of Modern Warfare now to restore my faith in the series.