After just over a week with the Grundig TV I can now draw a positive conclusion.
Due to some bad reviews for picture quality, I was really looking forward to this point and this can not confirm.
I'm really surprised that even at such a cheap device, good image quality is possible. Clear my Panasonic delivers in every respect a better picture, but that should be expected on the basis of the price difference. I have briefly tested the 3D function and I think the effect is clearly visible. Eyeglasses lie as mentioned any case, this is likely to be to get over, since these costs only a few euros.
The built-in DLNA player will play 1080p movies from my server from smooth. One thing bothers here but: The soundtrack can not change (or I'm too stupid for this). In Tuner, however, you can, if available, at any time change the audio. I also like to look at films in English, I now make a Raspberry Pi as a Media Player. Since the TV HDMI-CEC compliant devices support also can be controlled directly with the TV remote control, so also the RaspPi.
I had lying around a SAT-Receiver (Sky) and this compared to the internal tuner. In my opinion, the picture of the Sky-Receiver is a little better. The network playback via the RaspPi seems to be a little sharper.
The menu is simple and self-explanatory, but unfortunately the service is rather slow and can click on the menu impatient sometimes even completely freeze for a few seconds. Since nothing in the description mentioned by a Bluetooth function, I was surprised that this is yet integrated. The sound is, as expected, not very good, and with raised volume vibrate audibly the entire housing. My LG Soundbar I could connect via Bluetooth. When playing via Bluetooth creates a sound delay of about 1/2 second. For many devices, this can be corrected by adjusting the audio set. I would have liked to be able to adjust this directly via the TV.
Although the TV has a few weaknesses that I consider at this rate for absolutely bearable.
Those looking for a low-priced device with good facilities, will not be disappointed here.