I was attracted to this plugin because an optical compressor with the features of the Acme is an unusual beast. The ability to go from clean leveling to vintage colour, the amp section and saturation controls as well as the wet/dry balance, trim control etc along with that musical optical response makes this a versatile unit. I bought this plugin, however, because of it's amazing sound quality. I have a lot of very good compressors that can smash drums and basses and make vocals shine, but when I put this one on the master bus of a rock song I thought I had mixed already, the sound blew me away! Just starting with the preset "Master fattener" and tweaking the output gain to match the track, everything started happening. The sound was solid, the highs were sweet, the stereo imaging was fantastic, the bass popped out of the middle, the snare and vocals sang (no pun intended) and it all came together. This is quality. That "expensive" sound. Very impressed.