The puzzle pieces are processed accurately. The corner pieces have a stable hinge that is locked by the wrinkles and thus forms a permanent angle.
Some pieces had no or not readable numbers, which led to mistakes here and there, but they were quickly fix.
The attachments fit with a bit of press properly.
In principle, there are two levels of difficulty:
Simple - All parts are numbered in the building sequence and are simply plugged together gradually.
Difficult - much more difficult it is to ignore the numbers and assemble the tower like a traditional puzzle.
Conclusion:
++ Good workmanship
++ Fits all
- Some numbers unreadable
