I have one, use it regularly, and love it. I use it between a Bryston BHA-1 doing preamp duties and a 3B SST via balanced interconnects. I operate it in the 6db range. I used REW for a while. Fussed over getting a flat response, then gave up on that and learned to just use my ears to tell me what I like, and what I like sure isn't flat. I use the bottom four and top four bands to adjust for my personal preference, then fiddle with mid bands to accommodate anything I find offensive in the midrange of the speaker being used.

Especially cool is how it goes into bypass mode when powered off. You don't need a tape monitor loop to be able to disengage it. Just turn it off.

I really want their dual 15 band EQ too, but really hard to find in pristine condition.

Enjoy it.