A connection is established and after a few seconds the first sounds came from the plant. In controlling the music, the connection I was too slow. Not at all comparable to the speed of an original Apple TV.
A connection has been established, however, appeared only the charge icon and not even the first frame of the video was shown. In my network (Fritz box 7490 connected via LAN) unusable.
Broke every time when you try to connect to produce from. No chance to use this feature with AirBuddy.
Conclusion: So far I have yet to test any app that Airplay could offer competition to an Apple TV, unfortunately.