We stayed 5 nights at Daniel's, it was more than perfect. 20 min walking from Saint Peter's place / 10 min walking from Ottaviano metro station.
The flat is great : clean, good equipment, well located, bright, great view !
The terrace is amazing ! It really is a place to stay in Rome !
Daniel was very kind and available. He gave us very good advices on restaurants, places to visit... Nothing better than advices from a local :)