Used an Aphex 204 in my rack for a while back in the 90's. It was fun to play with while just noodling around by myself, but it had the sonic clarity of wet clay in a live band mix. In hindsight, I chalk it up to my own ineptness regarding the subtle art of signal processing. (i.e. anything worth doing is worth overdoing.) It did prove useful during a final mix for a session I was doing in the early 2000's.Aphex Exciter. PA guys used to use them to try and throw more clarity down a long room from their cheap PA systems.
Good riddance to both!
Knowing what I know now, I would probably make better use of it. That said, knowing what I know now, I probably wouldn't have bought one in the first place.