Ever wonder what the best GPS units were on the market? GadgetHeat has just put together your guide to the top three satellite navigation unit’s we have come across so far.

The Garmin Nüvi 350 has become on of the most popular GPS units in the world. GadgetHeat take a look at this little upstart punching above its weight as it takes on the likes of the TomTom One and the even the Knight Rider GPS