I chose Marco's place because of the location that is really perfect to explore the city.
The flat is super well located, incredibly clean & very well decorated. The communication with Marco was excellent, always very nice, fast to answer and really helpful.
Just have in mind that there can be a little bit of noise at night, but it did not bother me at all.
The house is also quite dark, but you don't go to Rome to stay at home, so it's not a problem !