I stayed at Gianmarco's place for three nights with my mom while we explored Rome and can definitely recommend staying in the quirky "painting room!"
The room is as pictured, with everything in both the room and apartment very clean. We were greeted by Adrian upon arrival, and he showed us around the space and gave us some tips on where to go for what within the city which was extremely helpful! Gianmarco is also very quick to reply to any questions/concerns to ensure that we had a pleasant stay.
The apartment is in a great location. You can walk just about anywhere: central tourist areas such as the Spanish Steps and Trevi Fountain about 15 minutes away on foot, Vatican City about 10 minutes on foot, and Colosseum/Palatine Hill about 40 minutes on foot. If you don't feel like walking there is a metro stop 5-10 minutes away and plenty of buses around the corner.
I would definitely stay here again and recommend it to any friends/family visiting the city.
Thanks again Gianmarco and Adrian!
Linh Sa