This is a very crowded area right next to Trevi Fountain, which is one of the busiest sight of Rome, so if you are limited in time and you wish to have all the main sights in 5-15 walking distance from the apartment - this is a right place to go.
In the night it was not very noisy so the sleep was quite comfortable (surprisingly).
The place was clean and well prepared, although very small, but still OK for two people.
The fountain is not seen from the apartment windows directly, but visible from the corridor.