Top notch location with beautiful views from the private courtyard. Kastro is a quiet spot, down the steep hill from Appollonia - we were able/happy to walk but the buses were infrequent if you don't have transport. To make the most of Kastro and environs (churches/swimming) you should be physically mobile.
Tidy, clean, nicely-renovated studio and the outdoor space was the icing on the cake!