This was not my first time using One Hour Air Conditioning and Heating. I have been using them for going on three years now and they have always been great. On this last visit they installed a UV light for some bacteria that was forming in my box. I thought perhaps it was a Freon leak but they did a good job explaining what it was and what they were installing. They always take time to go over things and answer questions. Their workers are always on time, friendly and knowledgeable. I recommend using One Hour Air Conditioning and Heating!