I totally loved it. You should visit both at daytime and at night as the town seems to be like two different places. There are many food and souvenirs stalls everywhere so you can get yourself something nice and also fill your belly!
Most of the tourits coming to Krabi province stay in Ao Nang so some places are overpriced and crowded. There are many beautiful beaches and a range of activities to choose from. The area is beautiful, perfect place for holidays.