I get the feeling that most large HVAC companies are just looking to sell you a new system, and are not interested in performing quality repairs for older units. After experiencing some shady interactions with large well-reviewed companies, I called Arthur's in hopes that a smaller, locally owned and operated company would provide better service with less sales pressure and give me an honest appraisal of my options.
Arthur quickly identified the problem with my outdoor AC unit and was able to replace the capacitor to get it all working again right away, for what I felt was a very reasonable price. He also gave me some great advice to use less-restrictive filters and that has really improved the air flow to the second floor during this hot summer.
I will certainly use them again, though hopefully not too soon!