I have used this unit for a week now and the performance is very good. As with any tankless unit there is a slight delay before hot water is available but I'm happy with the temperature of the water and the rate of water flow to the shower and bath is good. Its winter right now so the incoming water is very cold and the unit has no problem getting it up to temperature! For me important point was to have unlimited water so that if my kids take a bath in the morning I don't have to wait for the water heater to warm up I always have hot water available.
It was very easy to work with Mo. He stopped by my house after completing another job and we talked through the install process. Given that this was a power vented tankless unit the install involved a number of steps. He worked with me to make sure that the additional air supply pipe needed would not obstruct a nearby window.
1) Removed power vented tank water heater.
2) Install of new tankless water heater unit. This included:
1.1) Install of larger natural gas line to unit.
1.2) Install of an additional power vet air supply pipe.
1.3) Replacing a small section of drywall with stronger plywood .
1.4) Reconnecting existing water supply and rerouting some hot and cold pipes.
After discussing the time needed, the cost of the tankless heater unit and materials we agreed on a price.