I had a very nice stay with Maria for 3 weeks during March 2022. The location is 3 blocks from the Metro station at the south end of Roma Sur. It is a 20 minute walk to Plaza Rio de Janeiro in the heart of Roma Norte, so you have all of Roma very close. There is a neighborhood taqueria 2 doors away in case you are still hungry when you get home.
Maria's home is clean and neat, and she showed me every kindness. She lent me a small folding chair when mine was not adequate, and she took me shopping for sandals one day. She showed me and another guest the murals and statues at the nearby Centro Medico, and made other offers of excursions I could not accept due to my time constraints. I will certainly consider staying with her again on future visits.