So with my DAVE --> GS-X mini setup, these headphones are just fabulous! The level of resolution is right there with headphones costing $4,000 and more. The level of details on acoustic guitars from "American Standard" by James Taylor (on Qobuz 96/24) is amazing! Sound staging is right there with the very best headphones I've heard as well.
Comfort is neutral for me...not Empyrean super-comfy, but definitely NOT uncomfortable either. The earpads are super - cushy and after a few hours, I have no issues...and thanks to my full head of hair, no heat issues either.
Tonality and transparency are off the charts...definitely superior to the HD800S pretty much across the board (including imaging FWIW).
EDIT: Moondance by Van Morrison is truly something that has to be experienced with these headphones! With this setup, I'm right there with Van...bass hits in perfect proportion to the mids and the treble is so darn smooth, extended and very detailed! Again, soundstaging is off the charts!