Terrible experience. I trusted TrustPilot in order to proceed with a car rental via EconomyCarRentals and it went from bad to worst. I wanted to rent a car for a week and I paid full insurance in order to avoid the deposit on my credit card. When I went to the rental company they had made the booking with, called "Green Motion" near the Athens aiport, the lady at the reception had a really bad attitude from the moment we walked in. (You can check the reviews on Google and you'll know what I mean)
Anyhow, we got to the point where she told me they would keep a deposit of 806,00€ and that the agreement of full insurance was between me and EconomyCarRentals which seems like a joke. So in case anything happened I would have to pay the rental company and then try and get the money back from EconomyCarRentals... In the voucher I got after I made the booking it says Excess: 806 EUR for damages and theft 1450 EUR and below it says Guarantee / Deposit / Bond: 806 EUR. So they are basically saying we cover you for 806,00 EUR damages but there is also a deposit of 806,00 EUR on your credit card...
In the end I did not get the car because my credit card limit was exceeded (guess what, that's why i booked full insurance at first place). I offered the company credit card because I told them my company would be paying for the car but they could not accept it because it was not under my name, which is understandable but I was trying to find a solution. The lady at the "Green Motion" car rental company did not care at all, she never tried to find any solution, she just said call your agent (ECR) and cancel the booking for all I care. When I called ECR a representative told that they cannot return the pre-payment of 90,00€ (Which is approx. 3 days car rental payment, 31,00€/day) I had made because it was my fault I did not provide the credit card for the deposit.
I learned the hard way but a piece of advice to anyone reading this. Book a car directly with a car rental company and not through agents who claim to offer you better prices, you never know in what kind of trouble you will find yourself. They may keep the 90,00€ deposit if they are so eager for money but they sure lost more than 1 potential customer. I definitely will warn all my business associates about this unpleasant experience.