I just got the CompressorBank myself, and McDSP provided me with some very quick and professional service.
I love the sounds. I really missed it when the demo expired, so I just had to buy the darn thing.
I haven't played with the CB2 and CB3 enough to figure out the de-essing and post-EQ part, but the CB1 "drum twack" preset is killer on a snare, and I've been using one of the "optical compressor" settings on a lead vocal. It sounds nice, warm, and fat (I won't say the "ana..." word).
IMHO, the CompressorBank is one of those "essential add-ons", like the Waves L1 and Trueverb.
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LW