Well, I had two of the KSC TMP's:  widely recognized as the best new gas SMG out there and was unimpressed with its power.  It was a great gun to use to impress people and plink with, and it sounded great, but would be highly inefficient to use to play a game with.  My advice:  get it only if you have the extra cash to blow on it for a gun you won't ever use to play with in a game.