Cheaper isn't always better!
Made the mistake of trying to save some money on my winter furnace tuneup with another company. They told me I had cracks in my heat exchanger (used a camera) and needed a new furnace. I then had Holtkamp come and inspect my furnaces and they pulled the motors (the other company did not) and assured me both systems were safe. From now on Holtkamp will be the only company I use for my HVAC.