Do not sign up with Zipcar.
I applied and was charged $32.00 as membership and application fee. The first time I went to reserve a vehicle, I had problems doing so on their website and then called Customer Service. I was informed by the rep at that time that the reason that I could not reserve a vehicle was because Zipcar had decided to remove the vehicle and it was no longer available. (The car is located in a lot 2 blocks from my home and I pass it every day - it was still there after I got off the phone with the rep.) I asked for a full refund of $32 because I would not be able to use their service at all if they were removing the vehicle. The rep told that the application fee of $25 was non-refundable.
I informed her that since this was not of my wrongdoing and they took my money knowing that that car was not going to be available to anyone, they should have notified me and I demanded an immediate refund. I was refused by the rep and asked for someone in authority to speak to to get this resolved. My call was never passed to anyone in authority and I was brushed off the rep who stated they would be passing the matter over to the local office. I demanded a full refund immediately. They refused.
While I was filing the complaint with Better Business Bureau, I received an email notification that they had cancelled my account. Cancelling my account was never discussed with the rep - they just went ahead and did it.