When I worked in the schools I was in a course for sp. ed. students and the instructor showed us something like this and asked us to sit on it. Well, if this is anything like I sat on I'll definitely be getting one!!! I've had lower back problems over the years and as soon as I sat on this thing - did my back feel wonderful. I would really like to find it locally to sit on and try it out to make sure its the samething though.
And I do have a wide load!! :-D