Bought as a replacement for the AUDIOPHONICS I-SABRE V4 DAC ES9023. I use it on a Raspberry Pi powered by a linear power supply running PiCorePlayer streaming wirelessly from another Raspberry Pi running LMS under Max2Play.
It is a definite upgrade. Firstly, it is simpler to commission than the previous model. No faffing around with external on/off switches. (I power it off by turning off the mains block that serves the whole system.)
Secondly, it integrates easily and perfectly with PiCorePlayer.
The sound is different to the previous model. Clearer, more analytical. More urgent. It make the previous model, which still sounds excellent, sound smoother, but milder.
Anyway, highly recommended and a relatively inexpensive upgrade .
(I'm also using a ES9038Q2M board connected to my ancient (25 yrs old) Pioneer PDS901 CD player and experienced similar effects.)