All great and very friendly driver. The 12Go estimate was 5 hours for a drive between Bangkok BKK and Koh Chang even though Google Maps said 6 hours, and unsurprisingly that's how much it actually took – beware with connections and double check.
The car had bed smell of mold. So we had to drive with open windows for 6 hours from bangkok to koh chang. It was Suv car. The agency returned 500 thb and fairy price for inconvenience.
Driver was friendly but couldn't speak english. He wantet 300 Bath from me for the ferry to Koh Chang. Actually the ferry costs 80 Bath. I found out later and was quiet angry.
Very kind driver. He du drove us fast and safe to the our booked hotel in Koh Chang. I can really recommend to book this this transfer service. Thanks a lot to the driver, staff at the airport and online support. Great job.