Staying with Martina was really pleasant, the place is very well organized and clean, the breakfast is real good and they are very attentive to the guests needs.
Some days before my arrival, Martina informed she had a problem with the toilette and could not host the first night, but she found a place nearby for me to stay and made sure I found the place and waited there to verify it was alright.
The place is a bit far from the historical center, but near to a subway station (if you have heavy bags, consider taking a bus - it passes in front of the subway and two stops later you are in front of the building).
I recommend the place