We did not move up from anything, so the TM is the only thing we know. Using the TM toilet verses having nothing, or using public bathrooms, is a great asset. I'm much happier with our bathroom than I would be using the bathrooms in the campgrounds. If you use good chemicals, and empty when it's getting full, it works pretty good. I'm not crazy about the sometimes ordor, probably mostly chemicals, but if you keep the lid down it stays inside. We can go about 3 or 4 days without emptying.
Some friends of ours have a big 5th wheel and they don't flush into the sewer line, they empty when full. They say when you leave it open like that it can cause a black cone, which is not fun to clean out.
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