Fritz, I just bought and installed the 3hp Dust Gorilla. It works fantastically, but....
After all the good I'd heard about the company, I called to get more information. I talked to competent sales rep, don't remember his name, who checked in from time to time, until I was ready to order. I was then passed of to another rep, who apparently was under a bunch of work load.
Maybe I was expecting too much. I ordered the cyclone first, to make sure the ducting came out right. At the ordering ducting stage, I got as close to zero help as you can get. I even had to remind him to send me information on how to do it myself! Then I got information for a 2hp system, rather then the 3hp. I emailed again, and he said to just scale everything up. Very helpful, especially when I really wanted pay them to do it for me!!!!
It's an expensive system, and I really was not satisfied with the customer service I got, however, I suspect that this was an isolated incident. I'm also a little miffed when I hear of the free upgrades or shipping that apparently everyone but me gets.
In the end, I'm very happy with the system, but I would avoid the salesman I had. Oh, I whined about Felder on this forum a while back, and they called me to straighten things out. Don't be suprised if you get a phone call from Onieda.