The host was very kind helpful.
Excellent location, about 10 minutes walk from the Vatican, good connection to public transport.
The apartment itself however was a disappointment. The flat is very tiny, which we didn't realise looking at the pictures. The kitchen is in the wardrobe. When it rained, the water was leaking in at the windows. The most bothering thing however was the mold on the walls.
Overall it was suitable for a 4 night stay, but I wouldn't recommend for longer vacations.