Net Promoter® NPS®, NPS Prism®, and the NPS-related emoticons are registered trademarks of Bain & Company, Inc., Satmetrix Systems, Inc., and Fred Reichheld. Net Promoter Score™ and Net Promoter System™ are service marks of Bain & Company, Inc., and Fred Reichheld.
I had my oil changed on my 2015 Ruby red Mustang GT. One of the service people noticed a small scratch on my otherwise flawless middle crisis on four wheels. He pointed it out to me and told me that he would have the shop's polish guy buff it out for me.
They did this free of charge without me asking or even knowing about the problem. I love these guys.