We spent 3 great days in Nicolo's apartment. The apartment is very good, clean, well-equipped. The beds and linen are nice, so all of us slept quite good after our exploring of Rome. There is a beautiful small garden in front of the doors, with a fountain (at night time it sounds quite relaxing) and even little fish inside.
The apartment is very well placed, in 7-minutes walk from the metro station and not far from Vatican. There is a very good little cafe nearby, where we had our breakfasts every day.
Niccolo, the host, is a very nice guy, he replied very quickly at all my e-mails, helped us to arrange transfers from and to the airport, and came several times to ask if everything is OK.
So, to summarize, I want to say, that it was a very good experience. I can recommend the place for everybody who comes to Rome and for sure we will come back ourselves!