I might be hard on furniture like office chairs, but I didn't think I was that bad.   
The chair was perfectly fine and easy to assemble.   But then, a few months in, the screw-knob that holds the back of the chair in place snapped - the metal screw broke off the plastic knob - and then the back of the chair would just fall out if you leaned back.  I only weight 150lbs so I can't see that being an issue.

Maybe I just had bad luck with a defective one-off problem.

Too bad, though - it was a perfectly good office chair otherwise.