I recommend this movie to everyone from the age of 14 up to 66, who has a sense for black humor, sarcasm and persiflage. If your language is English, use subtitles, because the English dubbing would take down your rating from 8 to 3.
The movie has several well played and sympathetic characters, a nice story and good camera, actors and cut. It is obviously made like productions from America, but with an unique German approach, so it isn't a copy but a distinct work.
It is simply an enjoying movie, with funny dialogs, silly situations and some slapstick in a positive manner. Of course you can call the humor not very subtly, although it's sometimes almost black, but remember the target audience. And who would call Monty Python subtly ?
The youngster's acting is convincing, especially Thomas Schmieder as Konrad, but also Manuel Cortez as Wurst and Tino Mewes as Philip and the supporting actors.
It is a light-footed and fast comedy with some clichés, but obviously made with heart and soul. The clichés do their work and are not disturbing. The whole team is mastering the task with pleasure for them and for us. It is a shame that this movie didn't get the success it deserves in Germany.