As wireless display receivers the device fails totally

The positives first: The start-up is easy. The device, which is smaller than a cigarette box, just connect to a HDMI input (HDMI cable not included) and USB power supply. The unit is permanently on, is immediately recognized by the Nexus 7 (in Settings> Display> Wireless Display on) and a connection is made within seconds.

This is followed by disillusionment. Even still images - such as the view of the home screen - are highly fragmented and pixelated. On motion, as wiping the next screen or to invoke menus display responds with a considerable time lag. And. At two meters line of sight between Nexus and Push2TV Watching films, I tried on the Apps "Play Movies", Youtube and "Video Player". All three apps the same effect: it will be a maximum of one to two seconds played in terrible quality, and immediately it comes to audio and video. The films stutter in front of him, after 10 seconds of rest to come back two seconds Video / audio artifacts, then pause, then again artifacts ... The behavior did not change even when I put the Nexus 7 right next to the receiver.

Due to this total failure I send the device back immediately. I wonder why this technology does not work on current commercial devices, Airplay streaming for years perfectly, so hard this can not be yet.

Addendum:
Before returning, I examined whether a firmware update to version 2.4.3 fixes the issues. Mirroring unmoved screens has improved thereby and is less pixelated, but certainly not full HD quality. Also rotating and wiping by views went faster, but still with noticeable delay. I tested the handling of the game "Little Galaxy" in which the player character jumps by tapping the screen from planet to planet. Due to the delay, the figure jumped constantly over - and this in a fairly simple casual game. The worst is still playing movies or web-Files pixelated and stuttering and therefore completely useless for this purpose - at least in combination with a Nexus. 7