The main problem occurred when i found out that the person meeting me at the apartment, Bruno, didn't speak English. Luckily I was with my Italian friend. First question from Bruno was if my friend would stay at the apartment with me or not saying about extra payment, police etc. We totally agreed and said would call him if my friend wanted to stay. Few days after he called my friend and said someone saw him staying there for night and also mentioned about penalties. Sounded ridiculous because even I wasn't staying there the night Bruno was talking about so this kind of an attitude spoiled all the impression!
As for the rest, the location is pretty good, calm and safe, 3 min walk from metro station and 25 min from Duomo.