Yep fitted the square one 25 litres and have no complaints works off the engine and mains shore power. I think it is well made and I think the square one is has some benefits over the usual dome shaped ones.
Thanks for the Info Trident, how do you find the heat retention ? I know Practical sailor did a test and found the Isotherm to be the best manly because of the use of foam insulation instead of fiberglass .
Is the water still hot 12 hours after you heat it up ?