The apartment is well located in te city center, we could almost touch the castle.
Francesco is a very nice guy and more than friendly. He welcomed us personally and assisted in parking the car on a free location.
The inside of the apartment is okay and has all the facilities. Especially the shower is very nice. Downside is that the apartment doesn't have any windows so it becomes easily dark. However, Castelbuono is very nice so it's not really a punishment to go outside.
The apartment and Francesco are a good location to explore the city.