I noticed no new posts since 2018.....
Just very recently purchased a used unit for $300, mint. I wanted something from Steve that affords mobility, so I have it married up with my Shanling M5S player, connected with a 3.5mm ALO SXC-8 cable. Meze 99 Classic wood cup headphones.
I listen before falling asleep at night. The soundstage is dramatically improved from already very decent staging from the Shanling by itself. Very noticeably flatter frequency range [with no EQ used]. VERY easy to listen, never any fatigue. Very detailed, yet very slightly euphonic. Perfect for night time, before you snore away
Very much worth the extra $$ to augment any good player!