Marina was a fantastic host, we felt very much at home. We arrived late but she was very accommodating.
Her place was 5 minutes walk (or less) to St Giovani's metro station. We ended up walking to most places anyway.
She serves a very nice breakfast. And her place was very clean and spacious (changed all the towels every 2 days). She guided us and was very kind to us.
We enjjoyed our stay throughtly and we'll be back to visit Rome soon :)
Ps I was worried about staying in someone's house as it may not be ideal and you don't want to be in other people's way. But she doesn't live in the flat, she lives in the flat opposite :)