The seat is made out of some smelly compound that the state of California has deemed to be cancerous.  Had I know the latter I wouldn't have purchased it but by the time I got around to put the seat on and read the "warning" sticker, I had already cut up the box and insofar as assembly was at a point of no return - no pun intended.   The good news is that the smell eventually goes away.

My wife uses it but not all day, every day; more like a few hours a week.  If you're looking for a chair that would stand up to daily use then take my "sturdy" description in the context of its occasional use in my house.  I have no idea how it would stand up to constant use but I have my doubts.