We have had several break. However, we have them at our kitchen island and our kids often push back on them (kicking their feet off the island and putting pressure on the backs of the chairs if that makes sense)  I am not sure if they are poor quality or if our children are too hard on them.  We recently switched to backless bar stools, and while I don't like the look as much, they have held up better.  These bars stools are really attractive though, easy to put together.