Owner of the apartment was apparently Guglielmo, who lives few blocks away, close to the trainstation. Apartment was closer to the river.
We got the keys from Guglielmo, who came to show us the apartment and how the stove works, etc. He gave also good tips for restaurants and grocery shopping. And he was a very hospitable person.
Location was good and convenient. Trastevere trainstation is quite close. Bus and Tram stops were also near.
There is a good grocery store named Conad also few minutes away. Its a small supermarket, but not too small. You'll find all You need from there.
Area is Portuense, not Trastevere. But the trainstation is still called Trastevere station, which is still 5 tram stops trip to Trastevere itself.
Portuense is quite a dirty area. Still ok, if You don't mind living in a bohemian area.
The traffic is also noisy, but doesn't bother during the night. Same as the next door neighbor, who might listen loud music after work, but not too late. And the dog next door barks only to people walking in the stairs. But not a single bark to the noise we made in the apartment.
The apartment had nice decorations, functioning kitchen, good sized bedroom and a small bathroom with bad air conditioning.
If You use the shower, it doesn't dry with AC, You have to open the bathroom door and the windows from the kitchen.
There were extra sunhats, umbrella and slippers. Very convenient if You didn't have Your own.