We loved the house, it was very comfortable, but maybe not a perfect fit for twelve, because two of us slept in the living room. Also we had to improvise a bit with cooking, because we couldn't fit two pans on the stove at once. But it worked out fine in the end. Other then that the house and the host were great. The house is located in the center of the city and we were really close to the 'party district' and the main sights were in walking distance too! For anyone who wants to go to Thessaloniki with a big group this house is certainly recommended by us! We enjoyed our stay.