I won't be using rentalcars.com ever again. We rented a car with them for a three-week holiday. The booking process was straightforward, price was okay, and picking the car up from Sixt was actually a pleasurable experience. Unfortunately, my father died unexpectedly just as we started our holiday so we had to change our plans and bring the car back two weeks early. I called Rentalcars.com and they stated that as they were only a broker we had to deal directly with Sixt to ask about a refund. When I called Sixt, they said that as we'd booked through a third party we had to deal with rentalcars.com to get refund. When I called rentalcars back, they were entirely unsympathetic but refused to change their position. The frustrating thing is that Sixt would have been happy to give a refund if we'd booked directly. In short, although you may think you are saving a bit of money by going through rentalcars.com, their complete inflexibility and their total lack of sympathy at what has been a devastating time for us has cost us more money that we'll ever save, even if we book through them every time we use a hire car (which obviously we won't be doing ever again). Do yourselves a favour and go direct to the hire car companies and save yourself the massive hassle and frustration on the rare occasions where something goes wrong. I should point out that I have no complaints whatsoever with my experience with Sixt for this booking and would happily recommend them and use their service again.