Mara's place was great: the bed is confortable and the location of the apartment near the metro is convenient because it takes less than 15 minutes to get to the Duomo from her place.
There is a nice cafe in front of her building and several supermarkets nearby.
The pictures on the airbnb page are exactly as the apartment really is.
Finally Mara was lovely, she gave us a list of restaurants to try out that were on our budget.
I would recommend staying at her place!