Krabi is my favorite province in Thailand. There are many places to see, a few beautiful islands, delicious food, mountains and sun. You can try different sports, from rock climbing to windsurfing, hike mountains and visit temples. Everyone can find something suitable, prices vary and it's possible to find luxury hotels as well as budget accomodations.
Town like any other - food markets and shops everywhere but here the food is great if compared to the part north from Krabi. All the seafood and fruit have amazing taste. From here you can visit a few islands easily, also there's an aiport nearby that serves many national and international flights.