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.
A sign needs to be posted/people should be made aware that there is a extra 3.5% charged if you pay by credit card vs debit card. Other then that I was completely satisfied.