Supreme Air keeps their customers well informed of their technicians arrival via text messages. Youssef is very experienced and knowledgable technician on Geothermal hardware. He has great customer service skills, follows up on any action items resulting from service call, and offers energy efficient options for us to consider. I've been a geothermal customer of Supreme Air for 11 years and have had consistent, reliable service over the years. I recommend Supreme Air as a result.