I stayed here for 4 nights with a friend of mine for our first trip to Rome! Roxy is a lovely host, and her place was very clean. She is super helpful and communicative about what to see and where to go, and has just about everything you need in the room waiting for you when you arrive! She even messaged me a day before I arrived to make sure my friend and I knew how to best get to her house from where we were arriving in Rome– it was a nice gesture and very helpful.
While staying at Roxy's, you have your own entrance to the room via the terrace, your own bathroom, as well as a few small kitchen appliances (toaster, microwave, fridge) in your room. Everything was clean and the privacy was very nice!
As for the location, note that it is about a 30-60 minute metro ride into the city center from her place (depending on where you want to go). Fortunately, the metro is easy to get to from her place (5-10 min walking), and there are some nice fruit stands, cafes, and patisseries along the way. It is especially nice if you are wanting to get out of the tourist-filled center!