Great stool --- but NOT if you have knee or hip issues!
I purchased the stool for use at my office.  I have a habit of leaning one direction on an arm rest with a traditional chair and wanted to use a stool.  I learned about it from a physical therapist I was seeing.  She loves her stool and thought it would be perfect for me.  The seat is comfortable but takes a while to get used to it (it's a saddle for heaven's sake!) but before long it was too hard on my joints to continue using.  I agree with the reviewer that said the seat is wide and maybe that's why it did not work for me.  I'm still giving it five stars because I don't have longevity with the stool to say anything negative.
Rating: 5 stars