Much Technick for the money, but excessive operating concept

Hello There,
I have worried me the amplifier as a replacement for my old compact stereo system in the home office. I operate the unit only in stereo and Internet radio. This solution I have chosen as the device is considerably cheaper than real Sterereceiver with Internet radio.
I connect the device to the Internet via the TP-Link TL-WR702N Wireless N Nano Router, which over the LAN - connects the receiver to the wireless network at home port. This adapter is much less expensive than the Yamaha wireless USB adapter.

-Klang-
To the sound I can only find that even the stereo mode works. Simply connect the two speakers as front speakers. The speakers used are from the old compact stereo system, and do not allow assessment of the sound to.

-Bedienkonzept-
There are many weaknesses. The operation is without manual not possible and is not printed on.
Furthermore, the device always forget when changing from radio to Inernetradio or when turning on, that the Sond can not be left to DOLBY, but on 2-channel stereo.
The bookmark for the Internet Radio station list can be created only when you log in to the PC on vtuner.com. There, the station list is obviously also saved. Why want to know what station I like YAMAHA? And if the page should no longer be accessible vTuner, then the use of the Internet Radio function of the receiver is no longer possible.
For the rest, many menus can only operate when a TV is connected, because they are designed as on-screen menus.

Conclusion: I'm keeping the unit. Maybe we equip but eventually the speakers. For cinema experiences the device is likely to be sure class.