I have used Champion AC several times over the past few years. I've had a rental property that has had some issues with the AC unit and (each time) Champion provided excellent service. That said, this last time wasn't the best it could have been.

The service technician did an excellent job of mold remediation and repair work, but missed the fact that the filter was apparently the wrong size (20x20 vs. 20x24). I was unaware of the incorrectly-sized filter (as I don't live in the house and that was the responsibility of the tenants), but I would have expected such an oversight to have been caught and corrected during the last service visit.

I will continue to use and recommend Champion as I'm sure the mistake was an honest one. Overall, I like the quality of service and the speedy responses each time I call for a site visit/repair!