Has anyone ever used Diamond Car Rental? I had terrible experience with them. Their service was bad, their car was low on gas when given to me, and it broke down half way on my trip. They didn't provide any help when I called (they didn't even answer their phone or call back for an hour). I had to pay for the problems myself. I would highly recommend NEVER using Diamond Best Car Rental if you are looking to rent a car in Chiang Mai, Thailand.