No wifi on board, although they promise in the internet. The driver was the rudest and most unfriendly person we have met in whole cambodia during our 1 month travel.
So far, it was a good trip. The worse point was the aircon: it was freezing in the bus!!!! Also, WiFi does not work well as it uses a standard 4G bridge shared by everyone. But we reached out destination on time without any problem.