I am sure it is a very nice amplifier and sounds very good.
But I will never own an auto bias amp ever again (not meaning fixed cathode bias). Or one with a digital control of bias etc.
I would rather not risk a runaway tube if the circuit fails. Or even burning my house down if I forget to turn it off while away and the autobias circuit runs out of control.
Give me a meter and adjustment pots every time or fixed bias. And a set of HT fuses are a nice addition.
Speaking as an engineer and someone who has built many tube amps...even some from scratch.