our 2013 NorthStar Arrow had a cassett toilet in it and we liked it.
Holds about 7 gallons. Dumps easy. turn the pour spout, unscrew the cap. at the oppisite end of the rectangular box with roller wheels there is a breather value that you push. (The value eliminate any splash back or chugging as you pour.) lift and pour contents into any sewer pipe, or any toilet, at a rest area, your house, port a potty. thats where the wheels and extending pull handle come into effect. Looks like a suitcase on wheels.
We liked ours for winter camping for you can leave the rest of the camper winterized. and just use the cassette toilet separately for it has its own water supply. Plus many campground in the midwest are closed for winter and then we can just dump in any toilet if we need to.
Many people i think just get hung up on the I have to lift my pooper and do what. Its just mental. they still have to hook up a sewer hose to their pooper.