Short version After installation on 4/28 the ball was dropped in many ways by Davison Heating & Cooling – now Davison Home Services. From a missing part (needed in order to pass inspection) that I am still waiting for going on almost 3 months after install, to being double charged for the entire unit, having a tech come out for 2-3 hours for an estimate only to never provide a quote. It has been the longest drawn out process to wrap this up. Long Version The electrical was done separately, once completed I was scheduled for a start up with a Tech on 5/4. When start up was complete I was advised verbally as well as printed on the invoice : *The cap that covers the hex screw for the valve is missing, office ordering and will get that installed in the next week or two, it will not hurt unit to run* The gentleman said that it would take 2 minutes to put on and since it is on the unit outside, they can just park and put it on without me being home. When paying for the unit, I did part with my account and 3k worth on their 0% financing. When Wells Fargo was set up and I had visibility, I had been charged 6k. After a week, almost two of calling as well as telling them I spoke to Wells Fargo, they fixed it before my first statement cut. Thankfully. After the finance situation was handled, I requested an estimate to add some ductwork in the front room that has the thermostat in it. The Davison Heating & Cooling estimator (Tim) who came out was very friendly, took him about 2-3 hours doing measurements and draw ups. Unfortunately, I never received an estimate, even after multiple follow-up attempts for over a month. Instead of providing an estimate, after a month they sent me a text and voicemail from a technician saying they were coming the following day for another estimate. Keep in mind, I did not request or schedule this with anyone, just asked for my quote. By this point, I had already had HVAC Comfort come out (25 min for an estimate and 2.5 hours to complete the whole job). However, when HVAC Comfort was here, they advised without the cap that covers the hex screw for the valve that was never put on by Davison Home Services (even with over 2 months of me calling and requesting to have it done) my unit would not pass an inspection. I did pay Davison Home Services to pull a permit, an inspection has yet to be done per my knowledge. Called and let a receptionist know I was advised by a city inspector that they would be fined if this was inspected and the part was not on the unit. They again said it would be taken care of. That was last month. Today was my last call back to ask when the cap would be done. Receptionist tried scheduling a technician, so I let her know what every technician from their company had advised me, that they can park and put it on. She wasn’t thrilled. It should hopefully be completed by next week. One of the main reasons I had chosen to go with this company was because of the good reviews. Since switching to Davison Home Services, those might be changing. Wouldn't recommend.