This is a perfect stay for a couple. The apartment itself is charming, with a cool 1920s style lift (so you have to carry luggage only up half a storey of steps, not the whole way).
The location is excellent! There is an ATM next door, and a couple of good breakfast places within 5 mins walking distance, as is the supermarket. Lots of great restaurants for all budgets in the charming alleys all around -- we highly recommend "Giulietta", which is next door.
It is well located for a walking exploration of Rome -- the Vatican is about 25mins away, ditto for ancient Rome (in a different direction). The river is about 10 mins away.
Overall, we enjoyed our stay, and this apartment made a good base for our explorations.