Used Excellence once for routine maintenance on A/C unit. Within 5 minutes, Tom told us of many expensive repairs needed on unit that had been working fine prior to his visit. We declined his offer. Three weeks later, the unit stopped working. We called out another company that told us the unit had been overcharged with freon, causing wires to short out. So, first we were overcharged by Excellence for unnecessary freon, then we had to pay for another company's service call to repair their shoddy work. I would never use them again.