Don't get me wrong, I think the Rut Roost is nifty enough. I just can't see it being very effective if downsized too much. But thats just me and I haven't any experience with it.
I know last time I rode a bike with my nephews I was quite uncomfortable before long....and then there's those who ride all day every day like they're in the tour de'france and love it. I guess there's bicycle seat shape, same as saddle shape is talked about.
When I said downsized, I meant the thickness of material used. The thing looks like it could hold its own in a fight with an A10 Warthog.