I used other companies (usually because I had a coupon) in the past, but have not been satisfied with any of them. Frymire installed our original system when the house was built, and I used them one time for service. I was pleased with them but I tried to get a better deal using the coupons from other companies. Every time I was disappointed. The past three times I've had service I called Frymire--they were helpful, professional and gave quality service. I will stay with Frymire.