Using Audirvana with Qobuz to listen. The warning high volume is for real. Do not, repeat do not, put on the headphones and then start the music. Your eardrums will not survive!
The difficult part of some source material is dissected by the DAC/amp into what was recorded, I guess high quality can be said also. Fun factor is available when listening, definitely better than the DragonFly Red, now sold, which I couldn't separate from the MacBook built-in DAC.
Spotify isn't ideal for the DAC/amp, elevated low frequencies and one can hear that the streaming quality isn't top notch. CD-quality is necessary, however, then it sings!
Works with Raspberry Pi also, using it as DAC streamer. Compared to the hideous prices for some of the alternatives, this is a bargain.