These are great chairs- but I  have to say I had to take apart and put the first one back together like 4 times because the L and R labeling, while helpful is also confusing-- so be mindful of that. Depending on if you determine left and right from looking at it or sitting it changes the whole thing. They are sturdy. I don't like how there were no pre-drilled holes to attach the seat (and there are 3 screws for it, one of which is hidden. so, you need to have a drill or you're going to make yourself crazy. Also, I think that would help with centering.