We've owned the Eccotemp L5 for a few years now, and it has performed beautifully. We use it for the outdoor shower stall on our camping property in the mountains. We love it. It uses very little gas, and the steady stream of hot water is wonderful. It rigs up in minutes. We take the D cell battery
out when not in use.
You do realize that it is rated for outdoor use, only?
Eccotemp does make other indoor use models. If we ever get around to building the little "off the grid" cabin we plan to have someday, the water heater will likely be another Eccotemp.
I bought ours on Overstock dot com for around $100. Best $100 we've spent in a long time... Nine of us camped together last summer, and the little heater never let us down.