Have a few hundred hours on this. Have to say, wasn't all that impressed with the sound at first, but then added the CBS Hytron tubes and wow! It's been my main headphone amp ever since. No scratches that I can see and sonically sounds very nice. Have also used it as a preamp to good effect with a firstwatt f3. $350 obo.
should have feedback here and much more on audiogon, same username.
