Very happy... overall a solid, well-engineered product. I'm using it in a dedicated desktop application, perhaps different from how some folks will use theirs.
Pros: Small, good build quality, can drive every set of headphones / IEMs etc that I can throw at it to reasonable levels. Not fatiguing, and I appreciate the different 'filter' settings to try.
Cons: Constant blinking battery charge indication in display is distracting in a dark room, side mounted buttons are too easy to hit when you pick the unit up. USB connection for data is separate from USB charge.
Windows 10, optical/TOSLink cable, USB charger