Any amp that eats cats can't be all bad. Seriously, Atmasphere amps are very well regarded. Not hard to find lots of OTL fans around here.
Atmasphere amps trustable?
Tube world, a big world, then I came acorss the Atmasphere on the net, looks different from those common tube stuff... kinda weird, the M-60 uses 8x 6AS7G output tube and 4x 6SN7 driver tube per channel, where're the rectifier tubes? Plus they're so-called OTL, sounds even more weird.