The quality of customer service is the key differentiator between good, bad and indifferent companies. Good quality customer service keeps customers coming back; bad customer service drives customers away, taking their friends, family and workmates with them.All else being equal, good quality customer service gives the edge over competitors. Regardless of industry, here are the 9 key principals of good customer service that always make business sense. 1. Attracting new customers costs more than retaining existing customers A satisfied customer stays with a company longer, spends more and may deepen the relationship. For example a happy credit card customer may enlist the...