Very good build quality.
Update after 7 months: Quite good for household use. Obviously, if more than 2 children get on it, there is a problem. Up to 2 children, nothing abnormal happens. Even a small hole that the little one made, we fixed it and it was fine. Compared to other household items, it is of good quality and does not have the thinnest plastic, so it is relatively harder to puncture and break.