The Ghost Cube is a completely different idea (except they are both cubes) , using the idea of uniquely formed pieces as the Golden Cube adapting it to the 3x3x3. Although being a 3x3x3, it is quite difficult to solve, because you get lost very easily when you are not concentrating on your algorithms. The pieces are also of very high quality and allow smooth twists. Because of the irregular shapes you have to make quite exact turns, otherwise the pieces might get locked with each others. As the 3x3x5 the stickers also have some small bubbles, but this is not really visible due to the black colour. And the puzzle comes with a second set of stickers, too. The smallest stickers are probably fixed with super glue, but I would recommend to do this also with the larger ones or polish the surface even more, because I made the experience, that two of them fell off during my play. But that's nothing, one couldn't do by him/herself.
I am also very happy with this puzzle.
Size: edge length 5.9cm