Nice welcoming and helpful owner. That counts for a lot.
The suite has a full kitchen, including a small fridge, a gas stove, double sink (no dishwasher). The kitchen table is too small to fit a full meal for two people, But it works well for one and you can use the living room table to eat. Cupboards have enough space for food if you want to prepare meals.
Some might not like the fact the bathroom door is right next to the kitchen, but it didn't bother me. The shower works well.
Modern well thought interior design, given that the architect had to work within the confines of a narrow space. Considerable effort was undertaken to remodel and design a truly unique space. There is adequate clothes storage but ask for a few extra clothes hangers if you have two people. The bed is unavoidably situated at the front of the suite (you enter where the bed is situated). So no private bedroom space. There is a small office between the front room/bedroom and kitchen. I was able to use this for work.
This unit is four floors up from the street, so you need to be in shape. (I believe I counted 72 steps). After a few days, I found going up became easier.
The Pantheon is very busy. It is not quiet and people can be heard until late at night and into the early morning. This makes for a great night-scene. I liked it. But bring earplugs if you are a light sleeper.
FInally, this is an good location to sightsee and shop. Easy access to transit and Termini train station.