We had a marvelous stay at Marlène's Cosy Nest in the Heart of Rome. The location was the best feature, being only steps away from the Pantheon, thus mid-way between the Vatican City and the ancient city. We could easily walk to every main attraction. Marlène was a gracious host leaving milk, juice, and water in the fridge for us, along with a cell phone to contact her at any time. The internet worked great. The grocery is a few steps down the street.
The bedroom, toilet, and shower are a few stairs away from each other which was fine for us, but not suitable for someone with mobility issues. Hot water and water pressure was good considering the location. The bed was very firm.
The apartment is in an ancient building, which adds to the ambience of staying in Rome. This, however, does mean there may be a mildew smell now and then, but that is to be expected in an heritage building. We wanted an 'old world' experience, and Marlène's apartment fit the bill wonderfully.