I work as a make-up artist.  This stool saved my aching back and feet.  It's height adjustabilty worked well so I could roll around the person I was working on no matter their height. I didn't install the ring, to make moving the stool around with my toes easier, no banged up ankles.  Though I could see it would be necessary if I needed to be up higher.  The only problem I had was getting on the stool.  It takes some practice and is not skirt friendly.