Recommend having dinner at the restaurants close by around the corner if you are back in that area after sightseeing. The food is excellent and much less expensive than downtown. The coffee bar on the corner had excellent espressos and croissants.
We walked the first day to Spanish Steps and Trevi Fountain. Its a good way to see other parts of the city, but its not for the faint of heart. Its 5 miles roundtrip.