Lots of neat tricks and there's a range of difficulty in this set. I really enjoy just fidgeting with them and trying to figure out the solutionGot this as stocking stuffer for coworkers. It was way too easy but still a lot of fun to cheer everyone up and insert a little fun in the day. Need more difficult levels though.Good value for money, decent complexity for puzzles, there are still three I can’t do after two months. Some are easy, some are hard. I intend to give these as gifts at random moments to my nieces and nephews, and these are perfect for just pulling out of my pockets at just the right moment.I looked a while for a set of these that weren't flimsy, narrow gauges, or too small. I landed on these, and I am happy with the stoutness of the pieces. I don't feel like i am going to bend them by trying to solve them.These were all fairly easy puzzles though, not sure how hard they get, but I was able to solve all of them fairly quickly.Absolute great item! Great value! High quality puzzles! As others say, some are easy, but the majority will take you a bit to figure out! Would order again in a heartbeat!Bought for my son to play with on an upcoming road trip and worked out great. The metal quality could be a little better but other then that no complaints.Challenge yourself! Don't indulge in artificially created endorphins with electronics! Great for spatial thinking for children and adults alike!Very nice. Some were duplicates. 95% were easy for me, but everyone enjoy spending some time on these brain teasers.