We stayed two nights in the apartment, the check-in was easy as it has a box with a code.
The apartment is small, it was clean and very centrally located.
The host is very nice and very attentive, even if it was a bit complicated to keep a fluent communication, as he only speaks Italian.
The only problem is that in the offer it is not written that you have to pay 2€/day of tourist tax and I think it should be put so that it is clear from the beginning.