Ambient Intelligence (AmI) refers to digital environments aware of and reactive to the presence of people. AmI applications allow the delivery of services to customers wearing or carrying mobile devices via wired and wireless networks. Successfully deploying these applications, however, depends upon the degree of customer acceptance and utilization. This article concerns recent AmI implementations of mobile communication and radio-frequency identification (RFID) devices. The capabilities, merits, limitations, and challenges of these devices are examined primarily from a user’s perspective. Strategies for creating usable mobile AmI applications for hospitality customers are discussed.