Rent a car industry (www.vehicle-rent.com) did a survey regarding the satisfaction of their customers. Some reviews may be useful and help improve the car rental service, while others are just hilarious.
Here are all the unhelpful and funny reviews of the car rental customers:
More info: vehicle-rent.com
"Rude salesman stole money out of my wallet."
"Let's be clear. The car was dirty on the inside."
"The car was French."
"The car was very old and tasty."
"The car would shake at over 60km/h, became very noisy and felt like it wanted to leave the road at any moment."
"I have parked the car, but when I came back somebody had hidden the car and went off."
"In Chartres, we found ourselves well in Dreux we did not find ourselves."
"Staff didn't know which car was available and where they are."
