We spent 4 nights at Federicos place. It is nicely located, next to a lot of bars and Restaurants. Sometimes it is hard to decide where to go. You habe simply to many Options within a 5 minutes walk.
We almost did everything by foot. The apartment is in the middle of everything. Took us 15 Minutes to get to the vatican, 25 to the ancient city and like 10 to campo Fiori. What else to ask for.
The Handover of the keys was Superb. Exactly at 2pm Federico showed up, as we did arrange.
The only thing you can say ist not perfect is, that it is noisy at night. But it is trastevere and its supposed to be like that :)
Overall i would recommend the apartment to everyone. You simply have enerything close...
Go and make a booking!