The first day I received and installed the fabric holder of one of the polls broke in the lock. As for strength, it's very cheaply made. I don't know why they made metal poles to support them with a small cloth. In fact, he is literally held to buy "thread". I would rate it significantly cheaper. It takes a lot of balls to fill but my daughter loves this part and the entrance and exit of the tunnel. There are very hard rings in the tunnel and at the end she had bruises on her shins. I just put a folded towel under it, that helps a little. I used this during quarantine so she can play outside so it's helpful.