At first it took me a half hour and then finally I scrambled every number so that every row had different number is kind of like a Sudoku puzzle. I am ready for the next level up! This is great for when I am bored

This is a fantastic sliding puzzle - it's sturdy, smooth, and moves very well. The magnets help everything align smoothly, and after lubing everything glides nicely. I lubed mine like a clock; I put some silicone on the bottoms of the pieces and on the puzzle surface and wiped it with a paper towel to get rid of the excess, leaving the plastic shiny without any globs or streaks. My one complaint about this puzzle is that the extra piece which keeps everything in place when not in use is tricky to get out. I fixed this by putting some double stick tape on it so that it sticks to the puzzle case and comes out when you open it. This is the best sliding puzzle I've ever used - I highly recommend it.

AMAZING! Must have.
I love this puzzle. As a kid I was never very good at 15 puzzle, mostly because the ones you picked up were so cheaply built they were a pain to solve. This one is beefy. The parts fit fantastic and the magnets help make this zip along. The plastic case is a great bonus making it easy to take it along with you. It probably could have been a little bit smaller, but it is a must have for people who like to mix it up with some non-WCA puzzles.

This puzzle is smooth and fast. Problems arise only when you get to top speeds. The puzzle is good at staying together, and I think the magnets are good strength. I think the puzzle is a tad bit too large. A smaller puzzle would allow for faster times. I am seeing the 15 number changing color and starting to fade away only slightly, the other numbers are scratched up from me turning tiles upsidedown, but they are not fading away. This is the best 15 puzzle, because it is the only one. You might be able to make your own 15 puzzle that is better, but this one is about the best on you can buy.