I have 2 Takagi tankless water heaters. One in my home (T-H3S-DV-N) and one in a condo (T-H3M-DV-N) and both have been wonderful. In my home we put the unit in the attic and finished out the old water-heater closet as more storage (pantry). In the condo, we installed it on the utility room wall where it freed up much more space for storage. Both units have been rock solid. They heat instantaneously and you can adjust the output water temperature wherever you like. Additionally, both units are so efficient that we were able to get rebates back from the city.