I've grown to like it.
It's reasonably accurate up to surprisingly long range and the ridiculously low recoil allows you to keep your aim on target. A couple of downsides, the bullet drop is noticeable, and the thick sight might make it tricky to aim (completely obscuring your target). But all in all, I hit better with this than with StG44 in semi-auto mode. Actually, I hit better with this than with G43!
Even in CQB, you can blast off and hit with (almost) every shot, unlike SMG's which are used to hose the room full of bullets, leaving you to face the next enemy (which will be inevitably there) with an empty magazine. It takes some time to practice its use in CQB though, so it's not "IWIN" like the Chicago typewriter with a dinner plate.
The other night on PdH, I had a firefight with two rifle-armed Germans at medium range. I wounded the other on the first shot, in subsequent pop-out-of-cover-and-try-to-fire-before-him exchanges they both missed, but I scored one more wound, and was able to eventually disengage safely.