Genuinely the dirtiest place I have every stayed, and I have stayed in a lot of low budget motels in my life. The shower had a dank, wet smell, something that reminded me of a heavy Lyme buildup. It leaked and the cord for - I think the fan? I didn't use it) was dark brown with grime that had gotten wet over and over and never really dried. The linens didn't feel clean, the small fridge was broken, and there was a spot of what I am nearly certain was black mold growing from a crack in the wall near the floor. I cut my stay short by two nights and went somewhere else. I was only there for three nights but I got more bug bites in those three nights than I did in three weeks at other places.
Also, when I left during the day I locked the door, but whenever I came back the door was unlocked because it hadn't been locked again after cleaning. My door was right by the front desk so I'm sure the man at the desk would've noticed if someone other than me went in, but it was still disconcerting.
The only real good part of this was the man at the desk, he was very friendly and helpful with how to get to most tourist spots as well as where some food spots were nearby. Bilingual in Italian and English so I'm sure he's able to help most people that visit.
Location isn't too bad, a ten minute walk to Roma Termini which was pretty much my only destination during my stay there, but not in walking distance of other tourist spots for most people.