I have not had a poor experience with any one I know. There are standouts: Nelson Pass, Siegfried Linkwitz, Luke Manley, Steve Deckert, Ed Stewart,... And these guys have their own reasons for it; Pass for the sheer fun while experiencing unforgettable audio, Linkwitz for patience, guidance, and thoroughness, Manley for stepping up and delivering customer service above expectation, Deckert for promise and the guarantee of it, and Ed Stewart for good, fun, off-the-beaton-path products, and stories. The fact that all provided me with the greatest audio experiences of my life is grand.