ORLANDO, FLORIDA -- I recently had to travel for emergency business for NASA near Melbourne FL. I work in software design and was called down to troubleshoot the latest Atlas rocket that was to be launched on Friday Nov. 13th 2009. I drive a corporate car for business, insured by my comapny, and rent from Enterprise at least 4 times a month. I have NEVER had an issue with Enterprise but had to rent from Alamo since they were the only ones open when I would be arriving. The reservations were made, including all pertinent information (License number, etc.) I arrived at the rental counter at 11:30 pm, and was finally greeted by an gruff, obviously not happy to be there, annoying clerk. After giving him my reservation number, he disappeared for 10 minutes. No explanation as to why, or when he would return. After handing him my reservation papers and my drivers license, he inform me that Alamo had me on the "DO NOT RENT" list. No explanation, no nothing. I have nver had this happen before. I would have been stranded at Orlando airport and had to take a cab the 45 miles to my hotel. Luckily my fiance accompanied me on this trip and she was able to rent a car, after much hassle from the clerk. I was not able to even put on the car as a second driver. When I finally got a car, there were none available. We had to wait 30 minutes for a car to be brought from another terminal!!! When it finally arrived, the girl handing out cars actually threw the keys at us. No looking over the car for damage, no nothing. The car had a defective lighter which made our Garmin impossible to use. My fiance, instead of having a relaxing week in FL, had to shuttle me to NASA every morning, and pick me up every night. She had no idea where to go during the day, since our Garmin didn't work, and I had to hike from the main gate to the operations center daily. She could not drop me off at the op center since she did not have proper credentials. When the car was returned it was filled with gas, yet the gauge did not register completely full. The attendant asked us to present the gas receipt to the Alamo rental desk, which he signed off on. When we got to the rental desk, again, no one was there.... What a lousy way to do business. When I finally got an answer from Alamo regarding my "DO NOT RENT" status they said it was because I had rented form another company within the last 2 weeks, and I had had an auto accident in the past. Mind you, that was over 2 years ago!!! Then they sent me a bill for the additional gas (2 gallons) and since I didn't sign up for their fill up program they charged me 56.00 for 2 freaking gallons. Their customer service sucks, they are rude, (including their customer service dept) and their cars don't always work. I am disgusted with them and will never rent from them again. When I returned to NY, I told this story to my fellow co-workers and they have had the same "DO NOT RENT" experience. P.S. The Atlas mission had to be scrubbed, but it wasn't my fault!!!