I love this limiter - I blind-tested it against Toneboosters Barricade and Kjaerhaus Clasic Limiter and this was the most transparent, most open and most musical limiter. Limiter No 6 is too complex to use effectively, and others I tried had too much clipping. Maxwell Smart has no clipping, it just rounds off the transients whilst letting everything else through untouched.
No flashy UI, no VU meters, no waveforms, nothing... it has to be the most boring plugin ever... except that it just works, even when I leave the two controls at their defaults (which I do). Love it, highly recommended.