I have one on the way and will post my impressions here whenever it arrives. I will check all of the above.
What I would like to learn, if you could please confirm, if is they changed any of the controls with the buttons? I actually prefer TRNs scheme to Fiio models as it makes skipping tracks a lot faster. The volume control is lost on TRNs but I fiddle with that a lot less than track skipping so I hope it stayed the same.