We stayed in the apartment for three nights. We did not see Lorenzo but a collegue of him who handed us over the keys. This went just fine. The place is on the 2nd floor of the building. The street is right in the middle of Trastevere. There are lots of shops, restaurants and bars. Of course this means that it is very busy at night. The apartment is situated on the back of the building, which makes it much more quiet. We liked the fact that there is free Wifi in the apartment. There is also a hairdryer and plenty of storage in the bedroom. The apartment is very bright with high ceilings. This gives a nice feeling to the place.
Beware that if you want to sleep on the couch in the sitting-room, there are no curtains. So you will woken up as soon as it starts to get light. Further, the bathroom needs some refurbishing.