Very much enjoyed our stay at Yolanda's.
The flat is very well located in the Monti district, close to the Colosseum and surrounded by endless bars and restaurants. Other "sights" such as the Trevi Fountain and the Spanish Steps are a 10-15 minute walk away.
The flat is very nice and homely, containing lots of books, posters and character. The rooms are well sized and will easily accommodate four people. The living areas, kitchen and bathroom are all fine.
Yolanda was charming and very kindly was there to meet us despite our late arrival. I'd really recommend both this apartment and the Monti district for visitors to Rome.