The guesthouse is located in perfect spot - it's up to 20-25 minutes walk to the most known monuments. Restaurants are everywhere near to the flat. You can feel the Rome.
Apartment is cosy, has big enough rooms and there is a baby cot if needed. Located on second floor, with a small elevator in the building that helps you get there. Once we arrived we were welcomed by the host, all questions were answered and we were given a bootle of wine.
Only disadvantage I can think of is that during the weekend it can be a bit noisy during the night. However it is not a big deal.