Very well. Diagnosed problem quickly, showed us the failed parts in our current heater, offered to repair or replace the heater. We chose to replace the heater and they had a new heater installed and operating within a few days. This install was performed very professionally, and much better than the original install using many techniques to prolong the life of the heater. We installed a professional grade heater (cupro-nickel, brass, and stainless, digital), hence the price shown.