Free floating is a mess. Living in China the bikes were everywhere. Masses piled outside every metro stop. In Taiwan/Taipei the system has bike docks at every metro and many other places as well. There's an app that tells you how many bikes are at each location and how many spots are left to park in. Getting a bike uses the same card as the bus, metro and train. Really easy and convenient and more orderly.

Not sure how well it would work in some places due to vandalism and such.