I’m not a cassette or Northstar owner. Plenty of people like both, but I’d have neither.
My issue with the Northstar is they are far too basic for me, and I don’t like their floorplans. That’s personal preference, for sure.
My main problem with cassettes are the jerks who want to dump anywhere. Joking, but I would have a real problem with someone bringing gallons of their excrement to my work bathroom regularly. Luckily, I never had to deal with that. Seriously though, I find no issues with dumping a conventional black tank and like the ability to have much more capacity without having to dump.