One chair was being used daily, while the other, as a guest chair, gets far less wear. In the past month, the screw assembly on the left side came apart. I was able to replace and tighten it, but it eventually became stripped out and impossible to tighten. Possibly that one is just a lemon, but it could be that the chairs are not intended for all-purpose use in a small apartment. I've replaced it with a non-folding chair. The other chair remains sound, but hardware required some tightening upon inspection.