Thanks ronmac! Certainly it is very different from the other compressors I have, perhaps only comparable to the stock comp/limiter in Pro Tools.Well worth grabbing this one. I often use T-Racks to lighten the load on my UAD system.
This is an opto-style compressor, so best suited to duties where you don't need to slam the track. Used after an 1176 style comp (to reign in wild dynamics) on vocals it certainly offers the final "smoothness" without taking the life out of the track.