5x5x4 provides a good challenge and forces you to bend your perspective and find other ways to find solutions. The puzzle was a little tight at first, but loosened up with use. It has never popped on me. It's a quite smooth turning puzzle.

This cube came pretty stiff, and the inside layers still are. I haven't had many problems with it though. The colors are Ayi's shades and they are pretty good. It's lots of fun to play with, but it's pretty complex. I recommend it for people who can solve cuboids and who do not mind it being a bit hard to turn.

The Ayi 5x5x4 is a great cuboid to add to your collection! It came with some high quality stickers and they have not chipped or peeled in my experience. The turning is nice and smooth as well. My one problem though is the sharp edges and corners which make my fingers sore after a while. Overall, this is a great puzzle and I would recommend getting it.

The Ayi 5x5x4 is better than you'd expect. At first, it didn't turn too well, but after loosening the tensions, it was pleasant to turn. Not only is it a unique puzzle, but it also looks very nice in any collection. It came pre-lubed and pre-stickered. I love the shades it came with, but the edges and corners of some stickers have slightly began to peel. It's on the pricey side so I'd recommend buying it if you're able to afford it.