We had a really nice stay at Serendipity Rooms. It seems a bit tricky to find the first time, but the staff send us really good directions in advance, so it was uncomplicated to get there.
The hotel is located in a very nice area close to the city centre, only ten minutes to walk from the Duomo, with very nice cafes in walking distance. For example the Paninishop across the street, which makes really Panini, Arrancini and other food for really good prices and some great bars and cafes to get good coffee in the morning.
The staff is really (!!) friendly and helpful, the room was clean and well and modern furnished, with a coffee machine, a fridge and a tv. The location is very central and perfect to explore the city by foot.
We look forward to stay there the next time we visit the city.