Cons: The reservation was not honored. It turns out that the rental place is contracted by ACE and is terrible. On the website there was no mention that American Express is not accepted. I was told at the location creating a problem because I didn't have my VUSA card with me.
15 Sep 2016
Cons: Ace at London Heathrow is run by Green Motion which is a bus ride from the terminal 2. Nobody in the car rental zone at terminal had even heard of Ace. The staff at green motion were rude, they don't take Amex which forced me to buy their insurance and staff have poor English language skills - in UK!
Certainly will avoid at all cost.