It went very well. Larry and his assistant, John, did a superb job of the removal on two systems and replacement with two new ones. Larry is probably the most highly qualified technician that I have every worked with. He is the go to person for a/c installation problems. He is ably assisted by John who is himself a professional. They overcame several obstacles to complete the jobs and both homes systems are working as they are supposed to – and that is very well. You cannot go wrong with Cornerstone Pros. I have been a customer for some 10 or 12 years and I have always gotten top notch service. I would not call anyone else for an a/c problem. I have not used them yet for their plumbing or electrical services, but will not hesitate to call them when I have a problem with either one.