Buggy. Do not buy until problems are fixed

I really like the interface with few exceptions. There is NO way to delete a full album. Only specific songs. The app is not very stable. Also, if you are using an external DAC and leave it for a while not playing (e.g. after the album has finished) you will need to restart the app, as it loses connection with the DAC. It is not an iOS issue as other applications do not have this behaviour. That is almost killing the app and makes me want to uninstall it. Which I will probably do, even I have bought the hi-res feature pack. It is VERY annoying.
I do not recommend it until the bugs are fixed.
UPDATE: The App update on April 18th did NOT fix the disconnect-while-idle issue.

GreatSouls about Onkyo HF Player - Hi-Res Music, v2.2.3