We do not have a cassette toilet. We will have a cassette tank stored in case we need to empty the black holding tank in a place without a dump site. We looked at every toilet option. Incinerator, cassette, holding tank and compost. For North America, where we will be for the first year, dump stations are easy to find. Africa and South America is a different matter. We’ll cross that bridge when we are ready to ship the unit over. Until then, it’s the holding tank. How was the decision made? Well, we are a couple and decisions are made together. In the case of a tie when deciding something on the rig, I hold 51% of the votes concerning the exterior of the rig and she holds 49%. The reverse for inside the rig. We were in an expedition rig with a compost toilet at one of the Overland shows a few years back. It smelled bad. I know it’s probably the owner’s fault but my wife said “no”! And thus the decision. For now. (If it becomes a problem, we'll go over our options again.)