TomTom GO 720 Review (GPSmagazine.com)

To thoroughly test the GO 720's GPS performance, I mounted a Garmin nuvi 660, Magellan Maestro 4050, and TomTom GO 720 in my car, and headed out on an 80+ mile journey starting in New York City and ending in Connecticut. A relatively severe thunderstorm complete with rain and wind provided ideal conditions for pushing these GPS units to their limits, as I wanted to see how the units performed in less than ideal conditions.

TomTom GO 720

Garmin nuvi 660

TomTom's map seems to do a nicer job rendering the smooth edges of the water, and also displays a nearby railroad track that the Garmin doesn't display.

TomTom is using maps provided by Tele Atlas (recently acquired by TomTom), while Garmin is using NAVTEQ maps. The two different mapping providers probably accounts for the difference in the size of the water and distance between streets displayed on the Garmin and TomTom.

TomTom GO 720

Garmin nuvi 660

Garmin's map consistently displayed more surrounding detail than TomTom's. Notice how the Garmin displays nearby roads and water bodies, while the TomTom makes it look like we're driving on the only road for miles.

TomTom GO 720

Garmin nuvi 660