Zipcar no longer offers reasonable customer service, which means you may not be able to unlock your car, report problems, or extend a reservation. If you call, it will be at least 10 minutes of holding, not so nice when you are locked out of the car you paid for. If your rental car has problems, you want to be able to contact someone who can help. Even if you do get a person on the line, you will find them not very willing to help in any way. Getaround is not much better, but if you already know the car owner, it can be good.