I heard about, read about it, and now I've experienced it. The most exciting bus ride I have ever taken. A VIP bus from Chiang Mai to Ubon leaving at 12m. At about 3am in the morning it was raining. We were on a mountain two lane road and the bus driver was passing truck doubles--a tractor pulling two trailers-- on down hill blind curves. The driver, I'm sitting right behind him seemed quite confident of his ability to drive the bus between the truck and the oncoming truck with inches to spare. Holy s!!t. On the way back to Chiang Mail he fell asleep at the wheel at about 3:30am. The bus was weaving down the two lane road--he was driving in the middle of the road.
Why waste your money to go to Disneyland? You can just take a ride on a bus across Thailand.