Does what it says it will. Brilliantly. Although labelled as mastering buss processor, it is equally at ease on mix buss, drum buss..any other buss or track. Its most discernable features vs the competition for me are unobtrusiveness, transparency, and subtle euphonical way it treats audio, which makes Kotelnikov sound good at many different settings, whether light- or heavyhanded. I have been looking for a transparent software-based compressor for long, while many come close, this one shines above them. Equal loudness is a godsend for really hearing what you are doing to your signal, without becoming biased with the louder-is-better phenomenon. In the hardware world, you would have to look in the most expensive segment to find a similar level of control and "invisibility". Some features to my knowledge do not exist in hardware, certainly not in one unit. Pricing is incredibly humble. No-brainer deal.