My friend and I stayed in Bari for one night since we were heading to Dubrovnik via ferry. Pierluigi's place is definitely one of our all-time favourite AirBnbs due to its uniqueness and charm! It was extremely clean and beautiful. The spiraling stairs also led to a cute terrace accessed via an electric roof.
It was a little tricky to find since typing Le Nicchie into Google Maps takes you to a restaurant in Old Town. This Airbnb is located near the castle in Old Town Bari.
However Pierluigi is a very responsive host and speaks english well, so we didn't have any issues. He even had light music playing to create a warm ambience when we arrived.
This location is prime as it is 15 min walking from Bari Centrale where we arrived by train. The ferry port is also located ~10min away by walking. Restaurants and New Town are all walking distance away too, tucked away in the maze of alleyways in Old Town.
The only issues we had was that the spiraling staircase was very narrow and tight so it was tricky walking up/down from our room with massive backpacks and the wifi didn't quite reach our room (we were on the second level) - had to go down to the kitchen to use it. But that wouldn't stop us from staying here again - such a cool place! :)