Best bus trip ever, Bangkok - Koh Tao. Its comfy, roomy and the people working for Lomprayah were very kind and helpful. I did have the vip ticket though, but definitely worth it. Make sure to wear a longsleaved shirt and pants since the busses are airconditioned. But there will also be blankets if you travel by night. Half way along the trip there is a +/-30 minute break, to use the bathroom, eat or smoke a cigarette. Only slept one hour, but i didnt expect a full nights sleep.
Then continued by boat (2 hours) - if you travel in times of harsh winds and you have a squeazy stomach, make sure to take a plastic bag (but they do hand out bags on the boat also), better not eat before boarding and try finding a seat where you can look at the horizon, that also helps with the not-vomitting. At some point people WILL start throwing up - and then the chain reaction starts ... but I very much enjoyed the trip!