I guess my experience is different than the majority. I had a demo ref 110 for a couple of months. Had one tube failure and the next time the blown tube took the board with it too during LOTR - ROTK. I got so scared I sold my ordered unit without even taking it out of the box. Did I like the sound yes. Would I ever go back to ARC or tube amps no.
My 2 cents.
My 2 cents.