We stayed at Carmen's place for one night and it was perfect for our needs. The apartment is very central and close to all the sights, easily accessible from the Spagna Metro. We didn't get to meet Carmen but she was always available by phone if needed. The bedlinens and towels were very clean, and the apartment is exactly as in the photos. Carmen was very kind in letting us leave our bags at her restaurant (15mins walking distance) when we checked out, since our train out of Rome was in the late afternoon.