The service was absolutely impeccable. The whole staff from scheduling to the on-site crew was incredible. Due to Hurricane Irma, I had to reschedule and the staff stayed in contact with me after the storm working off their personal phones to keep in touch with me to find out when I had powered restored. Once power was restored they immediately got me on the schedule and sent Daniel & Ray for the 2 day project. Daniel & Ray were diligent, professional and steadily worked safely upstairs and on the roof top. After completing the install of the mini-split they did a second walk down of the duct work repair they were returning for the second day. Daniel and Ray were very thorough and made sure they knew exactly what they would need to complete the project. They arrived on the second day for the duct work repair with all the correct equipment and completed the work in timely manner while cleaning up and not leaving a debris or dust behind. I was so happy with the work I spoke with another family member and about the service I received and my Grandmother signed up with Cornrstone on the gold plan and will be receiving service on Wednesday 9/20. Great company, great employees. The owners should be very proud of their employees and how they portray the Cornerstone brand. Thank you Cornerstone!