I bought this to use in my cargo van to replace a horrible one. It flushes and rinses the bowl very well. If you pump hard the rinse water doesn't go over the edge. The O-rings +/or gaskets don't leak. On hot days you can use the vent button before opening the slide valve and avoid having built up pressure spraying any liquid in the bowl at you ( a VERY GOOD THING). It's easy to empty. I couldn't say ANY of these things about my last one (made by a major RV accessory manufacturer) which I threw away after a year. I couldn't be happier with my new Vevor portable toilet.