This place is very spacious, and in a wonderful location, surrounded by good restaurants and very handy to both the train station and the major sights in Rome.
It was very handy to have two bathrooms. The price is reasonable for what you get, and the washing machine was a nice bonus. Since it is on a higher floor, and backing onto a church, it was quiet, especially with the windows closed. The host was attentive, the check-in was easy, and we were able to get into the place early.
However, there are some downsides, of which a potential guest should be aware. Although the listing does mention "SECOND FLOOR NO LIFT" this is misleading for a guest from North America. In fact, there are 74 steps from the entrance to the apartment door. While this was not an issue for us, it could be difficult to reach the apartment for people with heavy luggage and/or with small children and/or mobility issues.
One annoying issue with the apartment was the light in the hallway outside the twin bedroom. This was clearly on a motion sensor, went on and off throughout the night, and could not be totally blocked from entering the bedroom. To be fair, fixing this issue would take some effort, and we did not attempt to contact the host over this matter.
As others have mentioned, the place really needs a deep cleaning, a bit of repainting, and a replacement of missing kitchen items. Occasionally, there was a smell of sewer gas in one bathroom, and also the toilet runs a bit in this bathroom. In the other bathroom, the shower door is missing one section of rubber leak-stop. Overall, I think that plumbing needs a check. Again, we did not contact the owner about these issues, as they need to be dealt with over a longer period of time.
Overall, an enjoyable stay that could have been improved to a 5 star experience.