The room itself is wonderful; comfy bed and clean bathroom. There is a hot pot that comes in handy.
Distance wise, it is fair enough, only takes 15 min by tram to SMN stn. There is a big grocery near the house. Marcos family restaurant right across the street which has really good reviews.
Just remember its on a rotary, so it could get loud depending on traffic but if you close the window, it gets complete silent.
Wish I stayed longer. Still, if you are staying longer than 2 days, which you should because 2 days are definitely not enough for Firenze and Pisa, I highly recommend Marco's place.