I have both a Marine Elegance and a Sea Era. Both fresh water flushers, both purchased new and installed by me 4 years ago, both in daily (constant?) use by a family
of 7 ever since. As a user I prefer the Marine Elegance, it is indeed elegant, but as the plumber I think the Sea Era is better.
I find that my Marine Elegance has a less powerful flush than my Sea Era, probably due to the 1" discharge (it also has to lift
about 2' higher to the tank). The slower flush reduces its ability to completely remove objects that are somewhat buoyant. I also find that it often leaves larger objects athwart the bowl. This necessitates additional water use in order to leave a clean wake for the next user. The Sea Era has no trouble with this and operates on less water in my boat.
I was not impressed with the ME's electronic panel. It began to malfunction
after a year or two (flushing by itself and not when you wanted it to). It isn't quite waterproof, so you'll want to mount it in a dry place. I much prefer separate buttons for independent control of the solenoid and the motor
, so I was happy to ditch the panel and go that route
I've had the wonderful opportunity to take both units apart to clear obstructions. The ME's 1" discharge line contains less standing effluent than the 1.5" on the Sea Era, which is nice. Otherwise, I find the Sea Era much easier to work on. The Marine Elegance is designed to hide all its parts
and so must be turned upside down to get at them.
Lastly, the Sea Era instructions specify that an atmospheric vacuum breaker (which Raritan supplies) should be installed after the freshwater solenoid and at least 6" above the toilet. I believe this is for health
reasons, so nothing nasty can swim from the toilet back to your fresh water supply. Not sure if that's entirely effective, but it is a nice thought. The Marine Elegance has no such vacuum break, and the solenoid is located under the toilet.
There's $.02 from a lowly marine sanitation engineer