Road starts form Flumet up to the Alps, through some small villages with a great view of Chamonix valley. Open and nice curves lead you to the lake of Roseland and then climps up to Cormet de Roseland (~2000m). The way down to Bourg St. Maurice must not be missed. One of the best scenery roads I have every ridden. Great view and lots of closed curves.
This is one of the highest roads in the Alps and is a must see just for that reason. The road really becomes interesting as it rises to 2200m odd.