We needed to replace a mismatched AC system that was put in our house by the prior owners. It was on it's last legs.
The owner of the company came by and gave us multiple options to choose from. Everything was well explained, I came out of it learning more and therefore being able to make a better decision on what to buy. We still got multiple quotes and RAS was the least expensive by a significant margin (in one case, thousands of dollars for the same seer/tonnage equipment).
The installers were very courteous and put down drop cloths everywhere they went in the house. The access to the attic equipment was very tight (closet push up panel with no pull down access), they still made it work even with the difficult access.