Nil8r has one. I haven't ever heard him complain. The only complaint I'd have is.. well, two.
The rounds are shit expensive and they're not really to carry, you don't need those kinds of rounds and they'd probably go in and out of the target; anti-productive, sir.
But the guns light, holds 20 rds, has almost no muzzle flip, easy to use, it's really fun to shoot.