car sharing works less well for getting to work because everyone else is trying to get to work then. You may as well own your own car for getting to work because you pay for all the costs anyway. All car sharing buys you is fixed maintenance costs on your car.

Car sharing starts to make sense when you want the car outside of rush hour. Want to go to the store for an hour at 2:30, no problem there are plenty of cars free. Want to get to work every day - you are paying peak rates for a car that will probably be used exactly twice that day, once to get you to work and once to get you home.