Friendly, professional, and knowledgeable. If they mess up, they make it right. Perhaps not the cheapest in town, but by far the most experienced and professional. I've been impressed and pleased. Good range of brands and prices offered on equipment, good range of services offered, and they work with good quality people (the individual who did the insulation in my attic is top notch as well.) I plan on securing a contract with them to service my unit twice annually.