Big improvement on the GPS they offered me in 2005 (and which I did not use me ... too long, too austere map). I use the GPS for mountain biking, especially when I travel far from home ... what fun to download a track on the internet, read the recommendation of its creator and dark discover the country without having to study the maps. .. leu only flaw: we little lost. The satellites are found quickly. Battery operated ... obviously it takes a long time ... I would have preferred a battery with charging by USB port. I added a microSD card to the IGN France ... gps seems to have trouble handled the heaviness of the map when you are on a large scale (3km), by against the scales required to play the track speed mountain bike is perfect, the map follows the movement. Very appreciated: scaling according to the movement speed. In any case it is very accurate.