The QuadraVerb was Alesis flagship Effects processor. I bought mine in 1990 for $500 when I was 18 years old. It is still in my rack for effects

To me it has the best reverbs and Chorus of any effects unit I have ever heard or tried. Back in the 90's I actually was getting calls to not only play bass but to run sound for theatre shows due to the QuadraVerb! I made a patch that sounded identical to Mariah Carey's "I'll be there" from Unplugged. I emulated the delay and reverb really well and used it on a sound gig for soloists. I had all kinds of compliments and my phone started to ring! To me its a classic.
But, The QuadraVerb GT..not so much. It was "ok" as a preamp but never had the quality of its effects only brother. As far as the guitar patches go...remember it was the early 90's and a whole different approach.