I think Paris is a great city to ride around, not as good as London, but much greater than Sydney. The city government tries to make it easy, and they have put in a number of different bike track options. But often on the same road you will really have to pay attention, the bike path changes. Sometimes you will ride on a separate bike path. As an example, Boulevard de Clichy, the same road the Moulin Rouge is on changes from have a bike path down the centre track, moves onto the road, moves onto a separated bike track on the road, to a bike track on the foot path near the shops.