Top unit with potential for improvement

Before I bought the Yamaha 577 I tried the Denon AVR-X1000 5.1. The warehouse equipment, however, was defective. My predecessor perhaps already found. That's a No !! I have saved this about 25.- What has not really worth it in retrospect. A tip on Amazon: offers customers a way to describe the failure of the device, otherwise the next buyer has again unlucky. So the device back to Amazon. Repayment of the amount with small obstacles. After several days of waiting time no information what about the device and the repayment ("My orders" only info that the return has been requested in the account). Call at AMAZON: "Oh, I'm sorry, the device is already addressed, I will initiate the repayment immediately"! Too bad that it worked only on demand.
But now the Yamaha 577th
The receiver complies with at least the minimum requirement: It works! I would like to enumerate here only the small weaknesses, but which is not always directly related to the device.
1.) The OSD is proverbial really out of the last millennium and is reminiscent of the early days of DOS. Since Yamaha could ever do something.
2.) It is not an official Yamaha Windows Phone App developed (shame !!!). But there has recently been an app in the Windows Store, which does not really work. Basically, one must always look for the device. Also, only the absolute minimum features compared to Android and Apple are - Apps given.
3.) Find Internet stations and use about Internet radio is complicated and could be much better resolved.
4) It would be nice also if there is a Web browser-Control function for the 577er gäbe.Warum not for a 677er and a for the 577?
5.) images can not be viewed on the 577er. When the Denon would have gone.
6) Manual only on CD. As the manufacturers save Although paper, but that's not very customer-friendly, since a direct this manual would be very helpful, especially for the establishment and operation of such a device. So I print my instructions from at least partially. If you have a tablet can also read there a little confusing and cumbersome BD.

My conclusion: potential for improvement is given in the first place in terms of Internet functions and the menu navigation. When such devices are already on the market which have the Internet, and the currently prevailing standard should be given in a modern menu navigation and menu display. However, these, Yamaha is still far away. But it's just like everywhere quickly, quickly, quickly develop what, bring to market and to be the customer only times enumerate the shortcomings!
I admit, despite the small weaknesses 5 star as the unit works reliably, the sound and the principle functions available on your machine are top. I run it through LAN cable together with Telekom Media Receiver, a Sony Blue Ray player and a Sony TV. WLAN I will only test yet.