Beautiful place, exactly like the pictures, very clean, and well situated. You can go everywhere by foot Very close to Santa Maria Novella station, where you can take the bus to the airport.
We didn't meet Gaia, her friend Rebecca have us the keys.
Only one little downside : the poor pressure in the (beautiful) shower, but I think that's what happens with old buildings.
So, I would highly recommend this place, and definitely go back there !