The apartment of Leonardo is fairly good. It is well located, within 10 minutes walk from the train station, and around 10 minutes by metro to Duomo. The apartment is pretty comfortable and fairly clean, contains basic necessary things. Was not really clear how to make water in shower warmer - had no explanation at the check in, so better ask yourself how to adjust the temperature.
What I could not understand is the situation with paid check-in. We have been using airbnb for quite a while and it is the first time I see that the host charges you for checking in after 19. Moreover, for us the time of check in was changed (instead of 14 we could come only at 15), while departure was scheduled at 10. However, we were allowed to leave the luggage for a couple more hours. Grateful for that. In any case, for me it is pretty much an attitude like in a hotel. I normally use Airbnb for a more warm communication with locals.
I can recommend this place for couples who come to the city by train for 1-2 days. The location is convenient.