This thing is fantastic, fun, and engaging to use. Sure, it's not as good as the electronic shuffler you see at a casino, but after 4 rounds of shuffling, you have a perfectly shuffled deck. I was worried about all the metal screws that came with the kit, but I was happy that not one plastic piece split open as I tightened the screws in firmly. The creator went above and beyond to make a step-by-step graphic guide on how to build it. However, some of the rings were difficult to determine whether which ones were the plastic rings or the metal rings. A couple of YouTube videos easily answered that.