I have installed a lot of these for clients in the past, but never really got feedback other than they worked great. I installed Rinnai and Bosch brands. Now, it's time to replace my KW sucking electric water heater and I'm going with propane tankless. I'm sure some of the Monkeys have these and can make some suggestions and usage observations. I'm interested in propane consumption, longevity, and of course a good deal.