I am a purist, I like my sound coloration coming only from my tube choices in the front end of my system. I have no interest in adding what I would guess is distortion to the sound, probably works in mid-fi, probably doesn't in hifi. Since, it is unused, I do not have the patience to wait for proper burn in (200 hours or so), unless you're Crites and that doesn't exist. I have to say the reviews are ridiculously positive, almost too positive. That is it. Nick