Snoozy sells the thetford cassette as an option .If one like the layout of the snoozy and doesn't want to deal with the cassette then get a Porta potti .
The things I like about Snoozy
1-rear door entrance regular screen door
2-A/C that one can purchase for $ 100-$150 instead of on the roof
3-cassette toilet once I fixed the blue hose .They told me that Thetford warrants them for a year So they can't fix them with other hose ?
4-I bought mine used and they still sent me hinge that broke after warranty was over .
5-Things that could be better a 12 volt Fridge
( cost about $400 more then Dorm Fridge
.Solar options better batteries .
6- 6ft 4 in headroom 8ft wheel to wheel stability
7- It looks COOL
Just my 2cents JIm