You get exactly whats written. One room with breakfast, living at Cristiana's place. Wheater or not it's ok to live with somone else and maybe her friends or other guests, it's up to you to decide. Anyway youll get your room.
Ther's possability to park your car nearby. The flat is bit off the city center, as written. Seems to be uprising part of Milano. We felt save. It's just a few mins. walk to the railway station, that brings you to the city center. Perfect!