What type of compatibility will you need with your navigation system? Garmin’s DriveSmart 51 has a USB mass-storage option that melds with Windows XP and Mac OS X 10.4 or later for adding your own apps and programs, whereas other models come with apps like Foursquare built in to help you find stellar restaurants and tourist spots on road trips. A clear overview of the traffic situation, integrated seamlessly into your navigation view via the improved traffic bar. Hands-free calling

Improve your route finding with real-time traffic information updates, jam alerts and road condition warnings relayed wirelessly to your TomTom GO 520 via your Bluetooth mobile phone. The TomTom GO 520 will calculate the effect of traffic and suggest alternative routes:

This unique technology enables you to add to, update and personalize your maps instantly. It also lets you share and benefit from fellow users' changes - daily, automatically and easily via TomTom HOME. Thousands of Points of Interest Further TomTom GO 520 maps are available SD card which insert directly into the TomTom GO 520. Available TomTom GO 520 maps include Western Europe, USA and Canada. The TomTom GO 520 also provides you with access to literally thousands on Points of Interest (POI) - petrol stations, parking, restaurants, cash machines and lots more. Many now come ready Rich Content - extra information on your destination or stop, such as overview maps, pictures, description and phone numbers.

How many extra features are you looking for? Several navigation systems offer different voice options and even accents — if you get tired of a robotic Midwestern voice, you can switch things up with an Aussie accent or an Irish lilt. WiFi updates are important, too. Some models provide the latest maps and software via WiFi, and you don’t need to be on a network to access the most recent updates. Hands-free calling, via Bluetooth lets you take a call with just a tap of the screen, or with speech recognition just saying saying "yes". So you can keep your hands on the wheel and eyes on the road. With optimised acoustic design, enhanced noise reduction, echo cancellation technology and the new high performance speaker the TomTom GO 520 gives you the best hands-free calling experience, comparable with Bluetooth hands free car kits. TomTom MapShare How frequently will you use your GPS unit? If you’re driving long distances on a regular basis, it might be worth it to spend a little more on a unit with more features. TomTom GO 520 come with the latest and most complete TeleAtlas maps pre-installed, for accurate, door-to-door navigation. The TomTom GO 520 includes maps of the United Kingdom and Republic of Ireland. Which in addition to street information include features such as route calculation, Points of Interest, Estimated Time of Arrival, and more.

TomTom Go 520 Learning Car GPS Navigation System, 5-Inch