Mike (on Friday9/6/19) was informative and provided me with the knowledge of rising coolant costs for the aged AC unit beginning Jan 2020. That and a really decent cost sold me on getting a new AC unit as the existing one is 20 years old. It is now Monday and Brock and Brian are here installing the new unit. They worked well and we are happy so for with the new unit as the temperatures are about to get hot again! Thank you all.