Krabi logic seems to work like this: the cheaper the food, the tastier it is. Ao nang boat noodle food is awesome (and extremely cheap!) staff is friendly too and service is generally good.
One particular dish i loved was fried broccoli. Another drink to die for would be : ice tea with milk! it taste much better than KOI or Gong-cha that i have back in my country!
overall thumbs up and a must try restaurant if u're in krabi ao nang :)