As Hertz Gold members, we have generally always rented from Hertz but would never do so again at Edinburgh Airport. We had rented an "Audi A4 or similar" specifically because we own an A4 and love the navigation system. When we arrived, we discovered that Hertz had no A4s at Edinburgh Airport and their idea of "or similar" was a giant Volvo SUV. Knowing that we would be driving on narrow roads in the Lake District for our trip, we were less than enthusiastic about the switch, but were willing to look at the car. After several attempts to figure out the nav system in the Volvo in the Hertz lot, we asked for help from the lot attendant, who told us that he couldn't figure it out either. We went back inside and asked if, given that this car was nothing like the one we had ordered and had a horrible navigation system, Hertz would at least be willing to provide a Neverlost GPS free of charge. We were told that we would have to pay for the GPS, so we promptly walked over to the Avis counter, where they were more than happy to rent us an Audi A5 and at a lower rate. Initially, Hertz was going to charge us for a day's rental for the car we never drove off the lot, but finally relented. The Hertz service staff at the location were all just incredibly unhelpful and, because of their inflexibility, lost the rental.