Julie,
no I haven't used the stool but I've used a lot of other props and, frankly, none of them work as well as my own butt . Depending on the dog and whether they are on the floor or on a podium, I've actually laid on my belly for formals so I like to have the ability to move around as I need to without worrying about dragging a chair or stool with me. Of course, the biggest problem is getting back up but I get lots of help from the exhibitors who appreciate my willingness to "get low".

Jim