We have had repeated issues with our a/c. HSA makes sure a tech is there within 24-48 hours, and calls to follow up. We were also sent the wrong kind of tech for an issue in the house, so when I called to voice my dissent, the fee was credited to my account after two phone calls (first guy said "he'd look in to it," second person got it done right away). Easy to deal with, easy to get help. Recommended.