Claudia's place is a real gem:
1. In term of location and transport is really close to train station (~10 mins) and to a lot of bus stations and still in the heart of the old town.
2. The place has everything which you need.
3. Availability, communication and openness of Claudia makes this list full.
I fully recommend, it was a unique experience.
P.S.: Try the cook of the neighbor (Dora) it is fantastic.