I had the misfortune to use Rentalcars.com. Due to a medical issue I had to return the car early to Avis in Canberra Aust. Avis noted the return on medical and cautiously advised me about rental cars. They weren't wrong. 7 emails 4 very long phone calls to get total runaround. As far as I am concerned it appears that this companies business plan is to screw its customers any way they can. Repeat DO NOT use this company. Very disgruntled ex customer.