Pier Luigi's apartment is very nice! really small but comfortable. the bedroom experience (climbing up the ladder and sleep close to the ceiling) was very cozy and interesting. The bathroom is good size and clean. Location of the apartment is just awesome. 2 minute walk from the main square in the old town and all other sightseeing is around you.
The only thing to consider is the lack of 4G and telephone signal (maybe because of the old and thick construction), but the real problem was that there were no WiFi, so if you're gonna stay for more then one night that could be a problem.
Anyway, the host was easy to talk to and gave good check-in description. I highly recommend it!