It really depends on how much you use the car, and how you use the car. car2go charges you a fairly high price for each minute you use the car, but as long as the place you're going is within their service area, you're only paying for the time you're actually driving. The less you need to drive, the more a service like car2go makes sense. The more you need to drive, the more likely it is that the fixed cost of a used, fuel-efficient car will start to pay off compared to car2go's per-minute charges.