I ran the 14-day demo and was very impressed; there's a lot of options on this one. The best feature has to be the Min/Linear phase switch; I'm not entirely keen on when to use linear mode and when to use min mode, but switching between the two quickly reveals which is more musically pleasing towards a particular application, and often the difference is drastic. It is the most expensive plug for the UAD at $250, which is probably the only reason I haven't purchased it yet (since I only really use MultiBand Comps for mixing guitars, and generally don't like them for mastering), but this is easily the best one I've heard.