Safe and busy street, easy to find, helpful staff, very good location, close to Termini, and so close to all points of interest in Roma old town. The street is one of the most well known, therefore anybody can tell you towards where to go if you could not find it. I would choose it next time because of the location.
We staid in an annex building, in a triple room. It was rather good on the whole, clean bathroom, towels changed everyday, etc.
The smell in the room was really bad at first, coming from the cupboard, therefore we did not put anything inside it and kept the door of it closed. And time to time opening the window, the smell was not so bad. The kettle was not working, therefore it was dissapointing for not getting any hot drink in the morning. The floor is made of tiles, and it is very cold, therefore be sure to have slippers. One night it was a little bit noisy due to cars in the street, however not so bad actually, it was really possible to sleep.