I've had mine now for a few days, and impressed, should have bought this instead of the CS1 earlier in the year, but already it's exhibiting same issue I had with the CS1, it disconnects randomly from my home network. The solution is to reboot the unit, rebooting the WiFi network doesn't solve the problem (which is what the in-app diagnostics suggest).
As I suspected, it makes no audible difference whether I use digital out into my A-S501 or analogue out, but the PEQ is a big advantage, even limited to 4 bands for the time being.