This is a very cheap cube, both in price and quality, and quite frankly feels pretty bad out of the box and has terrible spring whine. That being said, once you get 100 solves in, and lube the core and pieces, this cube is extremely good considering the price, and I think I actually prefer it over my aolong. However, the edge pieces fall apart, as they appear to only he held together with friction. I bought 4 of these, 3 for friends, and this seems to be consistent for most of them. This is very annoying when you are trying to solve, but you can preemptively solve this problem by taking the cube apart and super gluing the pieces together, or you can just wait for one to fall apart and then super glue it.