Wouah! I just came back from a 12 days trip to Thaïland! Besides seeing lots of buddhas and riding an elephant, I went there with my girlfriend Camille to climb. So we arrived in Tonsaï for a 7-day stay (quite short, I was so impatient the first 4 days to be on that beach, being so close to it... But girlfriend and tourism are inseparable=)).
So we arrived on Tonsai and the place is just magical! It is like a small bay with cliffs everywhere and jungle around it... People are chill and nice, and you eat like a king for nothing! I wouldn't say it's one of the best rock I have ever climbed. I have done some amazing soft routes with holds everywhere, but the hard routes are concentrated on the beach, on a quite small cliff (not that high, not that large). But the surrounding is so extraordinary, and the move so varied that you have got to love the climbing.