We own a Darchen 400lbs Rebounder Trampoline, purchased from Amazon. My 9 year old son uses it to bounce on in the house. He weighs less than 80lbs since we bought it in April 2022. Today while bouncing one of the welds on the legs failed, causing him to fall on his face. he was thankfully not seriously injured, just a bump. I feel that a trampoline advertised for up to 400 lbs should not fail when less than 80 lbs uses it. the trampoline has been stored indoors since we purchased it.