Very nice Christmas gift. I had already bought version 1 in 2003 and I wanted to have version 4 because of the publicity that was done. For me it is a great system that allows me without being a fanatic bike, do a little exercise with me and all the time. I find the brilliant concept and I bought 6 different courses DVD that allow me to walk, or visit the beautiful places such virtual Paris, Rome, the Dordogne, the Black Forest, the ascent of Mont Ventoux and shopping with pre-selected partners, even against myself to increase my own abilities. The internet allows to organize or participate in races with people located all over the world, but I have not yet tested. All the people who come to the house found this awesome system and children do not stop to shop them on course in forest, on velodrome in the city ... Suitable for all types of bike you own, mountain biking race and without special adaptation, it is nevertheless a computer powerful enough to have a very good video fluidity.