Called Reliance to inspect my tankless water heater to make sure it was operating and performing properly, as it started making a louder than normal noise. Armin, the technician they sent, was very professional, courteous, and came on time. He resolved the issue, but also spent some extra time and care in making sure it was in peak operating condition. He also answered all of my numerous questions. This is my third service experience with Reliance over several years (humidifier, furnace, water heater), and each time not only have they been reliable and dependable, but they've been very friendly and courteous too! Thanks!