I selected 4 highly rated companies from Angie's List to provide estimates for work I needed on my heating system. Basically the heater I have now is not old, but is too large for the house. In addition, the central return on the duct work was not connected to anything at all, the vents have never been cleaned (in the 6+ years I have owned the home) nor has the heater itself been serviced. Oliver was the one company who understood my needs from the beginning, did not try to upsell above what I asked for, provided an estimate in the format I requested, and worked with me to get the most out of the existing HVAC system, providing ideas to make it last longer, and giving me honest feedback. The Oliver workers were on time, completely professional, and cleaned up after themselves. They even saw that my dryer vent was not connected and they put a brand new one in without charging me for parts or labor (we had not discussed this as part of the work). This experience really emphasized for me that I should trust my instincts, and I am happy that I chose Oliver. I would totally use them in the future.