We had a great experience with AA Zack. We were an hour away from going out of town when a pipe leading to our water heater sprang a leak. We were able to reach them , and it was the Wednesday before Thanksgiving! They had us take a photo of the problem, and they came right over and replaced the leaking pipe. I feel lucky that we reached them. The problem seems to be fixed, and we are happy with their work!
To be fair, I had tried to reach them a few months ago for another problem, and never got a callback, but this recent experience was 100% good.