I hadn't seen one of these before. I like how its actually pretty simple. How many trips to the loo do you get out of a cartridge? 15?I bought a Laveo Dry Flush Chemical Free toilet and am super happy with it.
Not cheap, but it doesn't smell a bit and momma is very very happy with it.
I get the perhaps a buck a flush is pricy but for my money it is really worth it.