I've owned both - PUP was great when the family and I were young. Negative side of PUP was always lack of storage and having to open and close it when you prepared to go, get back, and anytime you needed something that was left in it by mistake. My wife never liked the cassette toilet so I took it out. I had an older Rockwood high side; the lift mechanism finally died so we traded to a small hybrid and enjoyed the ability to sleep on the couch while closed if we needed to and a bathroom we could somewhat use (shower was too small). We finally moved to a 5th wheel two years ago to get away from the canvas, the noise, and the need for more space for the grandson to travel with us. The hybrid was nice to set up quickly, space when it rained, and a real toilet to use. I don't really miss the PUP.