Within 2 weeks, 2 of the wheels snapped off, not just fell off, but the plastic they were connected by violently broke. I was fortunate with the worse of the two and it happened in front, so I only went down on my knee, rather than falling over backwards.

I don't lean in my chairs, my weight was entirely centered on what was supposedly able to hold 400 pounds, I do not reach this, not even close. Why, I wonder, were those legs so weak?