We loved the Xystum apartment in Trestevere! It is truly in the heart of Trestevere. The terrace is really nice, but may not be accessible to anyone with mobility issues. Also note the stairs to the apartment are narrow and steep which could also be a problem for any impaired visitors. It is a very charming apartment with a fireplace and a really comfortable bedroom. Host has a book that previous guest enter notes into, most of them are restaurant recommendations, this is a nice touch. All the information about the apartment is on a chalk board near door, another nice touch. She also provided water and a bottle of wine. There is an automatic coffee maker that uses Nespresso(original) pods.
The location is perfect with easy access to Ponte Garibaldi or Ponte Sisto to cross the river. Just walk out the front door and you have numerous restaurants to choose from. We enjoyed our stay here and would definitely recommend it as a base for your visit to Rome.