This place is very safe. You need to go past 3 locked doors to get in and most of the time there is a security guard there.
It is conveniently located with many restaurants nearby and the neighborhood comes alive at night.
The train is a 13 minute walk and you’re 2 stops from Colosseo (Coliseum). If you decide to stay here I suggest you get a multi day pass to go back and forth on the train. There is a bus station by the train station too. Another plus is a grocery store is on the walk back to the apartment from the train station, so you can get some groceries real quick if needed.
Some negatives, it said it had a dryer which it didn’t so we had to air dry our clothes. There is lots of trash and graffiti in the surrounding neighborhood, which is not Paolo’s fault, however, every Uber driver we used told us we were in a nice neighborhood.
My wife and I spent a month here and wanted to be outside the touristy part of Rome and this was perfect. Very clean, very safe, Paolo responds quickly and the price was perfect.