Beautiful model but with a few points of criticism

Positives:
The model is in the assembled state is very beautiful and the lighting effects are great.
Negatives:
The buckling of the corner pieces without breaking it is for 12 years (the lowest age-group) in my opinion too difficult.
The switch for the light effects under the model is sitting and the switching on and off can be done only by destroying danger of the puzzle is not good. Switching the lighting effects with an ultra small separate pressure switch (on the bottom), which can be operated only with Utility, is a really unsatisfactory solution. Why is this not a two-stage switch, such as used in the Empire State Building Puzzle from the same edition? Perhaps a better solution would be here an outboard two-stage switch (connected to cable).
I would like to mention that as often the case with German toys required batteries 3 times again not accompanied. In contrast to the Empire State Building Puzzle, the lack of batteries is not even mentioned on the box.