DO NOT GO NEAR THEM ! They are crooks.
I arrived at Palma Mallorca airport on Oct 11th 2018 to be be met by a very pushy agent who was insisting i take out their additional insurance cover. I refused, as I had taken out additional cover with Rentalcars. I specifically signed the 'do not accept' section of the agreement. On return to UK 4 days later I discovered that goldcar had charged my credit card for the insurance and I had a loss on exchange of £52. Currently Rentalcars are trying for one month now to get the £134.68 that I am still owed by goldcar.