We didn`t have to wait very long at alamo, but they didn`t have the car we reserved and wouldn`t honor our coupon from them for a free upgrade. They haggled over the original cost and wanted us to purchase insurance and gas up front. We refused. They finally got us a car and it was a junker. Rattled terribly and the air conditioner only worked part time and when it did it smelled like dirty socks. I wouldn`t ever give them another chance. My question is: Do all of the rental places run out of the reserved cars and have to offer different ones? If it is reserved ahead of time, how do they not have it available?