We stayed for six nights, as a family with three children. Great location, in the middle of the old city centre. We walked to everything. 2 min to Piazza Navona. 5 min to Pantheon. 30 min to Colosseum, Vatican or Spanish steps.
The appartment kept what it promised in terms of both facilites, location and charm. Including of course some "city noise", but nothing that kept us awake. The hostess, Guilia, was welcoming and gave good personal advice.
All in all, highly recommended.