The apartment's location is perfect, just in the middle of Trastevere, few meters away from a lot of interesting places to have a drink or eat something, and walking distance from the center as well.
You'll have to check before-hand with the host to clarify the self check-in instructions, as there was no mention to the apartment number when she provided then on a Whatsapp message, and we had to improvise and check her name on the mailboxes inside the building. It was somehow written on the reservation page, but very vaguely.
It has everything necessary for a short stay in Roma, but I disagree with previous reviews that state that it's a quiet apartment.
We experienced an incident thanks to some construction noise the morning after we checked in.
And besides that, which I can understand was not her responsibility, the walls and windows doesn't isolate that well from the noise on the street underneath, being a quite busy one.
I'd recommend the place, but there should be a bit more attention to detail if you're expecting a listing from a superhost.