Cast Disk

4 

I think this puzzle should be at least difficulty 3 (7 here). Of course it is trivial to solve it just by playing with it, but there are two different solutions depending on how you put the two pieces back together. And remembering both of them (the shortest path, not just circling around until you take the pieces apart) is quite difficult. It took me several days to manage to discern them. I also like the material they are made of very much.

4 

Quite easy for a level 2. I had this solved within a minute of unpackaging it. I can still wander down the wrong path when solving this puzzle, so it does have some replay value. It's a nice design and fun to tinker with.

4 

I like this puzzle because the mechanism is quite interesting, and it's fun to play with.

3 

Very easy but fun

0 

Great puzzle. Never mastered this one, just trial and error. Not as durable as some Hanayamas...got stepped on and now the joy is over! :-(

3 

This puzzle was pretty easy to figure out, but I still have problems trying to find my way through it; it is like a maze.