These are bigger than I envisioned, which is actually nice. The seats are substantial for adults and the larger base makes them feel sturdy. They went together quickly and easily and although I did not need the extra hardware, it is nice to have. The seat tops don't swivel easily, which is OK, too. We have 3 kids and don't need them spinning around like tops. Instead, with a little effort, these turn to make it easy to get on/off, but aren't intended for a thrill ride - ha!