I have the Airhead and have been using it for most of a year. It's just me and no one else. My bus is parked in the back yard while I continue the build.
The toilet works just fine, doesn't leak, tip over, smell bad. I wouldn't have one of these compost toilets without the vented fan. The instructions say not to "clean it out" too well. You are supposed to leave some of the composting microbes behind to regenerate in the new dodoo. ?? Hype - maybe. It's fine by me - I rather not clean with lots of attention to detail anyway. The pee jug is kind of a bother because it fills too fast. I may hook a drain line to a small under bus holding tank.
I still work full-time so I don't rely on the toilet 24hrs per day. As it is, I empty the bin about every two months. Using the coconut coir as composting medium. I bag the waste and throw it in the dumpster next to my bag of dog waste. Both are equally disgusting.
Given that my bus will not hold more than two or three small people, I can't see any reason that would lead me to change toilets. Unless, they design a magic toilet where your waste immediately disappears and leaves a lilac fragrance in it's place.