It's one of the few ways to travel from Siem Reap to Koh Kong. I was already aware tha5 the trip is split in two, and that I gad to wait in Phnom Penh for over 3 hours. The only thing that was not correct, at all, was the time of arrival in Koh Kong. But with all the road works (hey, it's Cambodia) that shouldn't come as a surprise. I arrived at 17.15. Still happy though.
Trip is split in two parts : a night bus from Siem Reap to Phnom Penh, and another bus to Koh Kong.
We waited 3hours between the two buses (from 5am to 8), and we finally arrived 3.5hours late (5pm).