You're confused as to where to start choosing a new GPS. Don't start with the salesmen and the latest shiny model, or even this weekend's limited time offer. A navigation system, sometimes referred to as an auto gps or a car gps can come in several different styles. A navigation system will come with a gps US map and/or a gps Canada map. Determine which map is best for you before you purchase your navigation system. The TomTom Go One navigation system can come with the gps US map and the gps Canada map.
The TomTom Go One features include but are not limted to:
* Complete maps on New Internal card: door-to-door navigation anywhere in USA and Canada
* Choice of routes: such as quickest, shortest, avoiding toll roads, pedestrian and bicycling routes
* Itinerary planning: plan your trip by defining multiple waypoints and destinations
* Route planning based on desired arrival time
* Optional warning when exceeding recorded speed limit (available on most highways and major roads)
* Car speed linked volume: volume of voice instructions will increase/decrease depending on speed of car.
* Anti-glare screen: always an optimal view
* Choice of routes: such as quickest, shortest, avoiding toll roads, pedestrian and bicycling routes
* Itinerary planning: plan your trip by defining multiple waypoints and destinations
* Route planning based on desired arrival time
* Optional warning when exceeding recorded speed limit (available on most highways and major roads)
* Car speed linked volume: volume of voice instructions will increase/decrease depending on speed of car.
* Anti-glare screen: always an optimal view
and many other fine features. 
Start with what you want from your GPS: where are you going to use the GPS unit? Auto, 4WD, cycle, in your pocket while hiking, overseas, at home, on the boat? If maps are important to you - not all GPS receivers are equal: start with the maps and find the GPS maps which best meet your needs. Do you want a GPS which will plot routes between multiple places. Same if you want to use a real-time update service for traffic conditions or pollution: these services will not work on every brand.
A navigation system such as the TomTom Go One has all the gps tracking one will need. Call it an auto gps or a car gps, it is the One navigation system you will need.