I have worked with 5 Star as my heat/air provider for over 10 years (Back when they were TSC). I have always found them to be very professional and courteous. They are always helpful to work out appointments that are convenient for me. The scheduling staff has always been amazing. The technicians that come out are wonderful. They are always prompt for your schedule time and should something arise to delay them they keep you very informed of the changes/delays. They have always done excellent work and I really do appreciate that they take the time to explain need repairs to me and will show me as well what they see with the units. Overall I could not ask for a better group to work with and entrust my service to. (I have also used them for electrical and plumbing).