We have been using ACA for several years and when one of our units went out a week ago, they were here quickly to evaluate the problem and get our A/C unit running again. Since our units were aging, we decided to replace both 5-ton units and followed Troy's expert recommendation (after my engineer husband researched everything and came right back to what Troy recommended from the beginning!). The process was very smooth, professional, without pressure and they were prompt. We are very pleased and will recommend them to others!