My rating:
Device-AUDYSSEY: very good, very easy in 15 minutes +++++
Sound CD-SACD: very good, very audiophile and autentisch +++++
Sound Dolby / DTS-HD: very good, very dynamic +++++
Image HDMI Bluray: 1080P very good, do not have a 4K TV +++++
AirPlay: very good on my PC with the iPhone 5S +++++
Internet Radio: very good, in my fiber connection +++++
Bluetooth: good, my iPhone 5S is not always recognized ++++ 0
Update Firmware: well, only via LAN, Wi-Fi I do not see here any other rating ++++ 0