We really enjoyed our stay at Monti design suite.
The place is just perfect, quiet street very near a place where you can have a drink and find a lot of restaurants. In the street you'll find a metro station but you can visit all Rome city center by walk as it is very central.
The room is little but confortable and with nice interior design. The bathroom and balcony are great.
Furthermore, Laura is really a great host! She helped us book a taxi from and to the airport, to print our boarding pass... and she is very very nice and discrete. Do not hesitate if you want to enjoy your stay in Rome.