Location, location, location! It was the perfect spot as a base for Rome! 5 minute walk to the colosseum, quiet very cute street, 1 block away from a piazza with restaurants. Walkable to all of the tourist sites. 2 blocks from a metro station and 2 blocks from a taxi stand.
The place was clean and on street level (happily no stairs to climb after a day of exploring). Works perfectly from 3 or 4 people.