A Finnish company called HappyOrNot is supplying Spain's airport authority with quick-check terminals to test passenger satisfaction with aspects of airport security and service. The terminals have four buttons, with emoticons ranging from a happy emerald green to a red-faced scowl. They're placed in various parts of the airport. Reported by SKIFT
They're also used by a number of retail and food vendors, and also at Heathrow (where this traveler thinks there is no real need for the green buttons...)
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