I bought 6 of these chairs a few years ago and they were fine. Now I bought 4 more and the materials they were made with must have changed as the quality of the newly bought chairs is very different to the old ones. The new chairs are extremely flimsy - the legs are fixed to the seat, but the seat flexes under a person’s load and the legs then are spreading apart (see photos). 
Very unhappy with the quality of the new chairs.