Had a QP2R demo unit for the last week, and I have to say that from (admittedly shaky) audio memory, I slightly prefer the sound from the 3.5mm jack over the QP1R I owned for about a month a good few months back. Great dynamics and musicality - I don't have any particularly demanding gear, but it absolutely loves the Andromeda on low gain/high bias. Hisses a bit with the Zeus-XR, but from my limited time with them (got them this week) that send to be par for the course.
UI is smooth if a little basic, and the scroll wheel actually works, and works well, which is something the QP1R I had never managed.
Don't have any other high end DAPs to compare against at the moment, but as I have to have it back to the UK distributor at Canjam London, hoping I can get a few side by side comparisons in before it goes home.
Will try and get some proper impressions up once I have a few weeks solid listening in the bag before Canjam.