Dennis
with the right speakers, (i used them with Electrostats) they are pure heaven.
It was with regret I had to sell them about 10 years ago. at the time there were no mods to allow unmatched tubes and even finding the 6lf6s were hard. Most places wanted $40 or more each, retube time meant some serious cash.
I never had a problem with them, I did take mine to Nick Gowan who cleaned them and retraced the entire amp with solder and made sure the connects were sound.