They upsold a highway toll box and charged an extra $240. Also, make sure to check the contract before picking up the car, as they had already charged for a full tank of gas. When returning the car, be sure to return it empty. I returned it with a full tank, and it was nearly impossible to get a refund through them. It's also very hard to reach the car rental company by phone in the U.S. Lastly, they required the gas receipt, which nobody usually keeps.