The studio is more than adequate - spacious and well maintained. It is also close to the Duomo, ristorantes and SMN station about 10 mins walk. It is slightly tucked away around a corner and if you dont like graffiti on walls it could be off putting, but dont worry, the area is quite OK.
Be sure to communicate properly with the hosts - we had some miscommunication and if it was not for a friendly Bar owner around the corner who phoned the owners to tell then we arrived I dont know how we would have gotten the key. I asked to be send a text message only but instead was sent an email.
Nevertheless, once everything was sorted the staff really went out of their way to assist us.
Highly recommended for value for money.