Tommaso & Michela are great hosts! I had a great time staying at the Blue Atelier. They were quick to respond, hospitable, and waited for me to arrive at the apartment to hand of the keys. I was able to explore more of the neighborhood through their recommendations.
The apartment is very close to Vatican City. As described, there are some steps on the way, so it'd be a challenge if you have a big & heavy luggage. Overall apartment is homey, clean, and nice as shown in the pictures.