The apartament is nice and extremely well located, right behind the duomo the location is perfect! We have informed the host that without internet we couldn't contact them but they didn't considered that and kept sending whassaps to know the time we'd arrive even though we had sent it. We had to wait more than 20 and ring the host (using our home cell phone) to have a person coming down from the same building to give us the keys and shows us the apartment.
Internet in the apartment was an open network which stopped working the same day we arrived. They sent us emails to inform us how to proceed us we leave the apartment but we could t read them because of internet.
If internet and communication improve I'd recommend the apartment but travellers must be aware that stairs are long and heavy luggages is hard to carry up.