Tell us about yourself!
Invalidating something without evidence is simply silly. YEs they have a video explaining how it all works. The vid is accurate the info is fairly accurate. The choice is to buy one or not, nothing more.
If you have ever served in the Army, toilets do not abound where you may end up. Squatting with the back against a tree for support , allows for everything (i do mean everything) to come out. No need to push down hard to get things moving. .