I travelled to Rome with my mother and sister and we had a great stay at Maggie's. The apartment has a great size and is very clean and as an extra bonus Maggie also provides breakfeast, candy, milk, water etc., which is really great when you arrive. The location is a bit away from the city centre but it is very easy to reach it by bus leaving from just across the street.
I can only recommend staying in this aprtment if you wish a cosy and quit stay in Rome.