Our first mini van was cancelled and we were rescheduled to a later time. When we arrived there was no van but they quickly organised someone to pick us up. We hopped in a car then got dropped at another depot about 1 hour away to finish the rest of our trip to Siem Reap.
What could have been a bad experience turned out just fine. They quickly fixed what ever went wrong.
The driver was courteous and drove safely. Only problem was, we were dropped off far from siem reap center, and left with tuk tuk drivers who offers 2x the price of Angkor Wat tour.