It has a garbage RoF and any situation where it would be arguably decent it can get rolled by a half-dozen other guns you should be using instead. It either needs a 3SK up close or an increase in RoF by 50 or 100 to be viable, but they won't change it.
The vector and chicom are both better SMGs, IE it is the worst SMG. -Every- AR is better too.
I still use it but you're pretty much stuck keeping a mid-range sightline and you're wasting the guns mobility doing so.
I' gonna startin' about fit'na start fin'tn about. Feel me? ~My friend Billy's stance on wanting a shot of Bacardi