Here's the scoop on CoGo. It costs $6 for a 24-hour period, but you can only have a bike out of the station for 30 minutes at a time (if you go over the 30 minutes, it's $3/half hour). There's a kiosk where you swipe your debit/credit card and you get a code to be able to unlock a bike. You must dock it at another station to stop the clock. When you're ready to make your return trip, or go somewhere else, you swipe your card again for a new code (you're not charged again). You can do this as many times as you want in 24 hours.
There's also an annual pass option for $75. For my math-challenged friends, that means if you use the system 13 days in one year, it's worth it.
The bikes are easy to ride, but they're 3-speed, and frankly first gear is a joke, especially in Columbus where everything is relatively flat. You need to bring your own helmet (in my house, we never get on a bike without a helmet, and if you don't already know why, you'll find out tomorrow). There is a place in front where you can strap in a bag or something, although I didn't try that.
Now, you might be thinking "but Gwen, don't you already have a bicycle of your own?" Yes, but by using CoGo I don't have to wear special bike shoes that clip in to the pedals, I don't need to take a lock with me, and I don't need to worry about the maintenance. My bike is meant for riding distances, not tooling around town.
I'll definitely use it again; I think soon I'll go to the library, as there's a station there as well.
Do you have bike sharing where you live? Have you ever used it? Would you?