I put a 10-gallon Atwood XT gas/electric unit in my Seneca. I am soooo much happier now! Low flows, no problem like there was with the Girard. And we use free campground electricity to heat the water 90% of the time. Even with multiple people showering we have never exhausted the tank. The XT technology seems to really work as advertised.
The installation was relatively straightforward, but it does require enlarging the external opening. It was painful to take a reciprocating saw to the beautiful paint! I was able to do all the work myself except for painting the Atwood door to match the rest of the coach.
Here is a link to a previous post about my swap:
http://www.jaycoowners.com/forums/f3...7ts-31841.html
Happy to answer any questions you might have if you decide to move forward.