Not Gatwick but used them in Iceland last year and it was horrible, over an hour to both check in and return the car, plus another 30 minutes waiting for a shuttle each way. Easily 50 customers milling around a small office that didn't even look like an office with 2 staff very slowly working. And the car we rented went into "limp home" mode repeatedly, although that could have just been bad luck on our part getting a lemon. The painful thing in Iceland was that although it was the cheapest option it was still more expensive than renting a BMW from Avis in Europe! I will never use them again. Also, service in Iceland everywhere else was outstanding leading me to believe it was the company not the culture.
