ACE London Heathrow branch is actually Greenmotion company which I believe they are partner and Greenmotion run service for the ACE. Therefore the service is similar to Greenmotion. One thing incorrect is I did have to pay for shuttle bus fee, which did not correspond to the voucher mentioned shuttle bus paid.

Waited ages to pick up car. Wouldn't accept my credit card for the deposit, but would accept it to pay the 0 excess charges as a result. Car was good though.

Everything was good except for the long delay to pick up my car. 2.5 hours wait isn’t acceptable, taking 40 mins to book people is crazy. You need to address the issues when renting to foreign drivers.

Great very easy to use

Like: The Customer Service Advisor Danielle provided excellent service and was very friendly. I would definitely recommend Ace Rent Cars/Green Motion because of her. thank you very much Danielle.
Dislike: Long waiting time to pick up but mainly because customers did not find out about company's policy before collecting car.