I highly recommend the "stir-fried crab in curry powder" (9/10) with a side of rice. You get so much crab meat and it's delicious! Its expensive (now 450B and it keeps going up!) but worth it for the amount of fresh crab.
British newspaper, The Observer, ranked this place in its top 50 restaurants in the world back in 2009. They proudly hang framed articles and awards on the wall.
I've also had the king mackerel which was fine, as were the chicken wings, Pad Thai and crab omelette. Apparently the coconut sorbet is great but they didn't have it when I tried to order it.