We have been using Summa And Tony's Air Conditoning Service since April 2010, when they installed a new Carrier Infinity heat pump in my home. I was so impressed with their service I have continued using them for all my air conditioning and heat pump needs. Their technicians are friendly, well trained and highly competent. They take time to explain any problems they find and follow up after the service. They are, in my option the best of the best.