We LOVED this place for so many reasons. It is a neat space and the partial views of the Pantheon were soooo cool. I took way too many pictures of the roof. The location is unbeatable, walking distance to everything we wanted to see. No need for transport from here if you can walk a little - and you should as it's the best way to experience Rome.
Great communication from the host and he was exactly on time for our entry and showing us into the place. It had the basics and was safe, secure, and as advertised. Does have an elevator which is nice for it being on the 6th floor that was helpful. We didn't use the Metro though it's not that close to a stop, there is a taxi station just outside the door and Uber was good and quick to get us to the train station for other travels. Good restaurants and gelato really close and varied, and again, the Pantheon - it feels like you are staying there. It does get a little noisy if revelers are in the main square at night, but we got some free opera out of it one night and it's part of the energy of being right there.
If you want to feel like you are living in a place where many have before you, and in a place that feels like you live in the heart of Rome - this is great for that. Old beams and windows that look out over rooftops in several directions carved out of the available space - it contributes to the experience of this quaint and unique space.
5 stars get posted a lot and I feel like 5 stars should be a high bar. While we didn't expect luxury, I went with 4 for one reason I had seen noted in another review. The bed was really average and the pillows were not great. I had a hard time getting great rest and that's my only caution. The mattress wasn't terrible, even with some good pillows you would be good, but both could be improved and then I would give it a 5.