Cassette Toilet vs Conventional RV Toilet

I haven't had a cassette toilet so I can not comment directly from experience. However, I suspect the answer to this depends on how big your black water tank is. I can easily see that compared to a 6 gallon black water tank the cassette toilet looks good. Our black water tank is 40+ so when I look at them their small capacity looks like a real disadvantage. We have never been limited in our camping trips because the black water tank filled.