We had a great stay in the apartment. It may be a little difficult if you have a young baby or child because the kitchen and bathroom are a little small, but it suited us perfectly, so we were very happy.
It is in a really good position, with Vatican City 20 minutes walk across the river, and Trevi fountain and the Pantheon were 10 minutes in the other direction. It was clean and comfortable. Lots of little resteraunts in the backstreets nearby where the locals seem to eat, although we didn't get a chance to try them, and we found a nice pizza takeaway 5 minutes away in Piazza di Ponte Umberto I, who were very friendly. We would happily recommend this apartment to any other couples.