Claudia's flat is in a very good and central position, almost in Plaza de la Virgen, you may see the Cathedral from the living room windows.
You are really at a 10 minutes walk from all the main monuments of the Ciudad Vella and there are plenty of nice restaurants and bars in the nearby area.
There also is a bike rental in the near square and a taxi hub on the other side of the church.
We were 5 friends and the spaces were more than adequate: there are 3 big bedrooms and 3 bathrooms, a big living room, dining room and separate kitchen.
Claudia has been very kind and helpful, she came to meet us for the check-in at the house really late at night (midnight) and answered promptly to any of other request by e-mail or wazup.
The only point I underline is that there was a strange smell in the block during the first two days of our stay, which was stronger on the stairs, but opening the windows was resolutive. On monday the smell was gone from the whole block.
I definitely recommend staying at Claudia's!