NYC's Citi Bike started out terribly. But they've improved in leaps and bounds since inception: Better bikes that are rarely broken (some with the really cool NuVinci continuously variable gears), better app, more up-to-date stats on available bikes and docks, good manual rebalancing and community incentives to rebalance (Bike Angels), valet at crowded stations.... to name a few improvements.

They've had to raise their price almost every year - but at $180/year its still a steal.

When Uber came to NYC I (wrongly) thought that it wasn't going to have such a great impact because of the sheer number of yellow cabs that were never that far away. My initial feeling about Uber Bike if it comes to NYC is that it would be great - and help boost bike rider numbers.