I had an RNC and in the end lent it to a mate of mine as I didn't use it - I prefer the Waves rCompressor, but I do have a pair of Urei LA-4 limiters which are absolutely fantastic and solve problems that Waves won't touch.
Really want some more compressors actually ... trouble is I also want some more ins and outs on the computer to connect them to and I think this may become an expensive option ...
ps. anyone else had a fiddle with the new Waves Transform stuff there's a couple of good things in there though the timestretch tool is far clunkier than I was expecting...