Sorry I didn't know where else to put this Info!
It cost us 1000 baht(Aud$35) from Hua Hin Bus Station had approx 30 minutes stop along the way for something to eat.
They gave us through out the trip ,Water, Juice,Bun and pkt snacks.The seats were very comfortable with seat belts and lots of legRoom. It took us about 9 hours day time trip so lots of sites to see along the way.
I was a bit reluctant because of how fast they drive in Thailand, but rest assured we were probably only travelling 85kms per hour....definitely recommend it! Oh...nearly forgot restroom on board.