When the second-floor air conditioning stop working, I called polar express at 1 pm and they came out at 5 pm that same day. It was 82 degrees in the house so I was desperate for a quick solution. The repairman was very professional and quickly diagnosed several things that could be the issue. He also went over several things I could do in the future to prevent this issue from occurring in my other A/C units. I know that if I ever have an issue again, they will be the first company I will call.