1) Confusing: The wide range of functions leads to confusion at the front panel, remote control and general operation.
2) No Bluetooth:
The device allows only AirPlay (ie wireless digital connection to Apple devices). This goes not reliable, I often spend minutes until I can connect, and that, although it is me earlier on several occasions succeeded.
Non-Apple devices can be digitally connected to the home network with the receiver. I use this (not more than three times as expensive Yamaha) a wireless LAN adapter from Netgear, which works fine. There is a very good Android app that lets you completely control from across the room the device and can leave his music library sound. Disadvantage: Only this. Other media such as podcasts will not play. Anyone who wants to play all the audio content of its non-Apple device, have to go through the analog connection, which sounds much worse.
Conclusion: The device does what it should. Overall, I do not entirely convinced his ease.
