For our Rome holiday, we decided to stay at Matias' and, all in all, we were satisfied with our accomodation.
The room was spacious and furnished with a double bed, a wardrobe, a mirror, and a table with some chairs. It was enough space to not tiptoe around each other and had enough places to stow away any luggage. Like the room, the corridor and the bathrooms were super clean. There were automatic lights in the corridor which came in handy. The bathrooms are a bit on the smaller side, but had everything that was needed (towels, toothpaste, shampoo), and we even had a hairdryer in our room! That's really amazing service!
The only drawback (which has nothing to do with our host!) is that there was an elevator right next to our room which we could hear all night going up and down. But I tend to be a light sleeper, so that's only a minor downside really (on the other hand, the flat is situated in the backyard which makes it really quiet compared with the road outside).
What is really amazing about the flat is the fact that it is right next to Castel Sant'Angelo and Saint Peter's Basilica. It also doesn't take much time to get to other sights (Spanish Steps, Pantheon, Piazza Navona, ...) and it was ideal for us tourists getting around. Also, there are great restaurants and cafes quite close!
To sum it up, if you ever want to visit Rome and need a well located "base camp" to tackle all that this city has to offer, then you'll be in good hands with Matias' accomodation!