When you run a busy operation that serves thousands of customers, it can be easy to overlook the benefit of asking your guests what they think occasionally. After all, when sales are strong and business is running as usual it can seem like an unnecessary exercise. If there was really a problem, your customers would tell you, right? Not necessarily.
Regularly soliciting your customers for feedback isn’t just so you have reassurance that everyone is happy. Customer feedback can play a much more significant role in the overall experience one has with your brand, service, and its representatives.
http://www.touchwork.com/15-questions-need-ask-next-customer-feedback-survey/