I work for United Airlines and I rented an SUV from the OKC airport for a vacation trip to Destin Florida. I had my mom and my two small kids with me. Along the way I was stranded in Memphis, TN with major transmission problems. I called their road side assistance and it took them 2 hrs to send me a wrecker with another SUV that had bald tires. I followed the wrecker back to AVIS and returned both cars. Then after waisting 3 hrs of my vacation time they gave me a third SUV. When I made it to Destin after the 4th day of being there, a light came on my drive mode. Once again I called and told them they had given me another car with transmission problems. I ended up speaking with someone that spoke very bad english from their Tallahasse road side assistance who didn't know how to use a GPS to track me down and find me. The worst part was this person lived in Florida but didn't now where Destin was so he tried to find me and with no success was unable to locate where I was staying because he was 700 Miles away from me! I called the Fort Walton road side assistance and at this point this had turned into a nightmare for me and I was becoming more and more agitated that I wasn't getting the proper assistance I needed to replace the bad car with something else that would get me and my family home safe. After serveral hours later, I received a phone call that someone from road side assistance in Fort Walton, Florida was finally coming to rescue me and take their lemon back. When I returned home and presented my complaint to the OKC Airport check out counter along with all the paper work I had acquired from each bad car and what I had gone through just to get a safe car to take me home, they only deducted 2 days worth of rent. I felt very cheated after I had paid over 800.00 just to go through 3 bad cars and my vacation time very interrupted with something that should have never happened in the first place had they kept up the maintenance on their cars. As I mentioned before, I work for United Airlines and I assist 100's of custmers day in and out, but the one thing I always do is make good on a bad situation.