In the last several years, Garmin has become a leader in the GPS market. One of their most popular models is the Nuvi. There are many variations within the different Nuvi models, including: screen size, Bluetooth capabilities, text to speech, and other features. The Nuvi has proved to be one of the bestselling navigation systems on the market. Since each Nuvi is equipped with different features, each unit is specific to an individual's needs.