Yes, if anyone has actually used one I'd be interested in feedback as well. Curious if it vaccume packs your business or something?
I use a reliance hassock toilet, and I think it works perfect for what it is. A bit better IMO compared to the clip on seat lid/bucket, simply because if it's size, internal smaller bucket (the smaller bucket gets the bag), and storage spot for TP. The down side to the hassock its its height, a little short for me on the ground. I've a raised spot for it in my truck which turns out to be perfect.
I did modify the hassock a little bit by adding a foam stick on seal to it, and stick on foam to keep the inner bucket aligned.
I've used "wag bags" & home prepared double bags with kitty litter in the hassock. Both work well, the "wag bags" are just easier. I bought military surplus "wag bags" bulk online, so price is near equal to ones I can home prepare.