We felt that the technician William was very knowledgeable. He told us the truth on what we needed to have done without pressuring us to buy. We were offered installation for the same day. The installers were very clean and made sure my house was in the same condition as they had found it in. The installers did a great job explaining the operation of the furnace and a/c unit.They answered all of our questions.The installers cleaned the area very well. We have always used Four Seasons for our regular furnace and air conditioning units. I would definitely refer Four Seasons to family and friends. Four Seasons did a awesome job.