Rentalcars.com is a scam. I have booked a car rental through Rentalcars.com with a pickup at the Warsaw Airport. It turns out Rentalcars.com does not have any offices in Poland, they don’t even have any cars. Rentalcars.com is a "middle-man" online only company from Great Britain. Rentalcars.com does not have any vehicles to rent. They use other (real) car rental companies to fulfil their bookings. Rentalcars.com charged my credit card $901.10 about a month before my trip, but Rentalcars.com did not pay the local car rental company in Poland. I supposed to pick-up a vehicle from Warsaw Airport from an agency Rentalcars.com designated to fulfil my booking. But when I landed at the Warsaw Airport and went to the designated location, I discovered that that companies’ office has been closed for about two months. I did not get the vehicle, but Rentalcars.com kept my $901.10 claiming that I did not show up. Check Better Business Bureau, you will be surprised what you see.