We loved our three nights at Michele's apartment! The flat itself was exactly what we were after - clean, modern, and comfortable. Everything was working and everything we needed was provided.
San Lorenzo is a fantastic area to stay in as a young couple. The main tourist sights are within walkable distance and it is conveniently close to Termini station, but the area itself has lots of offer with plenty of great bars and restaurants. It also felt pretty Roman and untouristed and we enjoyed its laid back but buzzy atmosphere, especially in contrast to the more hectic city centre.
Michele himself was the ideal host - communicative without being overbearing, check in/out with him was easy and he gave us some great (and extensive) tips on what to do in the local area. He was also just a generally nice guy. Would recommend highly.