We stayed in B&B La Lupa 2 nights. We loved the location. It is less than 5 minutes away from the tramway and Trastevere train station. The neighbourhood felt safe and it is full of bars and restaurants around. The access to the main monuments in the centre is easy and short.
The room and bathroom were super clean and all renovated. The shower was a bit too small for us and hot water ran out once.
We were also charged 8 euro as municipality fee, which we think should be mentioned in the add.
Oh yes, and Cristina is a lovely lady ;-)