I wouldn't say I'm a puzzle master, but I'm pretty good at them. Whenever I come across one I usually don't move until it's done. With that said, this puzzle is one of the most tough and addicting ones I've come across yet, if not THE most. It is a lot of fun, but be prepared to spend a while trying to figure this one out. If you're the kind of person who has to have it put back together and put away, I suggest taking pictures before you dump it out of the container. Great and very challenging puzzle.