I stayed in B&B PIETRA VIVA for 1 night. It is located on a super quite and local neighborhood with traditional alleys. We were 4 people in total and everything was perfect, from the hygiene of the place to the communication with the host (English, Italian). Spacious accommodation with a fully equipped kitchen, 2 double beds and a really nice bathroom. Also, along with the reservation, breakfast was included on the nearby pasticceria plus some things on the house like marmalades and juices.
I would 100% recommend it to anyone planning on visiting Bari and the nearby cities, villages but remember that everything would be easier if you owned a car.
Bari - Sannicandro = 15 minutes by car