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of the « Mystery customer » type to the sales outlet of a major retailer.
of a new vehicle, beauty product, smartphone, hotel stay.
of a new advertizing campaign, a new logo, packaging.
of a new smartphone application, new equipment.
in a political survey, an infrastructure or public service project
other professionals (architects, artisans, lawyers, executives, retailers, company managers, chartered accountants, doctors, solicitors, vets …) to evaluate a new service, to help in research.