This puzzle belongs to the famous cast series of the Hanayama's puzzles and is ranked as 6/6, so very hard. The name of this puzzles just comes from the letters "n", "e", "w", "s" written on the puzzle.
When you move the puzzle, you can hear things inside, but you cannot see at all what you are doing, that's the difficulty.
The goal is easy to understand: you need to separate the 2 parts of the puzzle.
|I like the design|
If you don't know how to solve it, it may be difficult (so I would agree with the difficulty of 6). But when you know the solution, it is ranked as very easy for me. Because the solution is easy to repeat again and it takes less than 10 seconds to open it again and again.
There are some puzzles ranked 6/6 like cast enigma, or even puzzles ranked as less difficult like vortex (5/6) that are much more complicated to solve again and again, since they need a lot of steps before being solved.
I don't put a picture of the puzzle solved because it can spoil quite a lot... :-)
Moreover, this puzzle has a mecanism that other puzzles have, so it has not a unique mechanism.
However, the quality is good, the price is not expensive, the puzzle is easy to be repeatedly solved.
For these reasons, you should own it. Especially if you intend to collect all the Hanayama's cast puzzles.