The devil node is actually known. Six parts must be hooked into each other. This puzzle is a "one-way puzzle", ie you only joy of assembly. The disassembly goes by itself. So if you want to gift the puzzle, it should pass broken, so that the recipient has something to fiddle. Who at the first disassemble everything remembers who has solved the puzzle in 3 minutes and no more fun in mind.
The quality of the puzzle for this manufacturer is very good. Everything fits perfectly, does not contain any gaps and closes flush. The wood itself is also of good quality. For puzzle beginners a good start.