The Klimbs are being used at my work. They are great tools to change in a variety of configurations for dogs to play on, like children on the "monkey bars" The legs don't seem to stay screwed in tightly as the dogs jump on and off of them. I check them every time I use them for safety. If you don't have that, perhaps a reminder in the directions to made sure the legs are screwed tightly. The cost seems steep for one Dog Klimb.