I know I have never used one, but I really think that I could use it, the setup looks like it will support the normal position I find myself on the lower portions of cars and especially boats.
I've often thought about buying one, I tried one when I was in high school and seem to remember it was nice. Only thing I'm unsure of is when you need to polish the bottom panels, if its a pain it get down that low.
you can buy small lifts for about 1,000$ or you can find a dealership going out of business with the display platforms and ask to buy it from them or have someone build it for you.....that racatac looks really uncomfortable due to the bicycle seat.good find someone might like it.