It seems from reading the reviews on this product you are either going to get a chair that works as a chair should, or one that is so utterly useless that its only use might be as bonfire fuel or for clubbing invasive rodents; there does not seem to be any middle ground between these to antithetical extremes, somewhat like American politics. As it happens, mine fell into the first camp, i.e. it works, which might be because I put it together properly, or I was just lucky. Either way, I've been sitting on it for several weeks now, and it hasn't collapsed (188 cms tall, 90 kgs weight), it still goes up and down, and my only gripe (unfairly as I should have read the product details a little more closely) is that you can't pivot the back. The quality is pretty much what one might expect for the price, and it does everything a chair should. I think that, if like me, you are scouring these reviews, becoming increasing frustrated at the divergent opinions, and umming and erring as to whether or not it is worth making the purchase, then you should do as I did: 1) Can I afford to get another chair if this one ends up in the rodent clubbing bracket and I have to return it?; and 2) Can I trust that people are much more likely to post negative reviews than positive reviews, so the product is probably much more likely to work than not? If you answer Yes to both those questions, then you should probably go ahead and buy the chair.