This place has an amazing location, the walking distance to all the attractions are amazing.
Trevi fountain : 7 mins
Colosseum : 20 mins
Pantheon : 11 mins
Forum : 19 mins
Vatican : 32 mins
The apartment is for those who like to get out and about, not to just sit around. Everyone else is right about the heigh upstairs, I'm 5'9" and have to duck under the beam in the head side of the bed, other than that it's clean, easily accessible, and in the heart of Rome. Plus across Barberini Plaza is the only pizzeria open past midnight so you always have somewhere to eat.
The host was amazing, offering both amazing and romantic destinations to visit and eat as it was my and my wife's anniversary. He continually checked in on us as well as offered to have a car pick us up form the airport and drop us off right out front of the Airbnb for the same cost as other transportation options but with no hassle. I would recommend this for any couple looking to explore Rome.