Antonio's place is great if you are heading for a weekend of partying in Trastevere and aren't looking for too much in terms comfort and wont be spending much time home. Unfortunately we picked this place for an 8 night stay which brought out the negatives. We still had a good time but it was far from perfect. Let me elaborate...
* The place looks fine, but it's quite a bit more worn down that how it looks like in the pictures. A renovation is very much due.
* Others have mentioned the noise from the street. Even though we expected it, it was much worse that we thought. The place is actually right in the middle of the most busy party streets. The windows are old and don't keep out any noise. And the thing I was most surprised to not have mentioned in the comments is that there are two bars under the window pushing loud music from 10pm until 2-3am. Every day except Monday if we were home it was like trying to sleep in the middle of a concert.
* Internet speed: Again a thing that becomes irritating if you're staying for a bit longer. The internet speed was 1Mb/s which is barely usable for browsing (and mobile internet wasn't working well for me from inside the flat either). It's not fast enough to watch a movie or have a video call.
I don't want this to sound like a very negative review because the flat is fine especially if you're staying for just a few night and especially if you plan to join the party outside your window.