I know people who use the Paris bike share a lot and can't speak too highly of them. You get a heavy, clunky bike, but it gets you where you want to go.

But a word of warning.

A one-day rental is usually buying you an unlimited number of half-hour rentals and not one day to take the bike anywhere you want. So you ride for half an hour, dock the bike, go drink a coffee, or visit a museum, or walk and look at something. Then you go back to the docking station, pick up another bike (or even the same bike) and ride to your next destination. I always worry when I see people picknicking with their rental bikes because I know they are going to get a nasty surprise on their credit card at the end of the day. If I can, I even tell them so.

It's a great way to see a city.