A great example of great design
Having travelled overland thru Africa for three months, visiting most places starting with "Z", and many others, all I can say is I came to really appreciate a freshly dug longdrop.
There were flush toilets (squat) with no running water that people still used, that I had to use.
There were long drops with wicker lids, writhing with maggots in the full sun.
There were outhouses that reeked of ammonia so strongly, you literally couldn't breath. Literally.
There were times we dug our own shallow holes in a farmer's field and did our business there.
In the Serengeti, you don't even go behind a bush. Lions lurk behind bushes. You do it on open ground.
I was just a visitor. I only began to understand the issues faced by the locals every day for their whole lives.
So I applaud initiatives like this. Anything that makes life better for rural Africans. Anything that "just works", requires minimal and simple maintenance, and costs very little, can only be a good thing.