We loved the apartment! The location is super. The check-in was easy. The furniture is charming and the decoration in general makes it worth a stay. There were all basic utensils including tea, coffee, sugar, oil, shampoo. Also air conditioning was useful.
As it is written, the stairs are narrow and it is not the best idea to go with big luggage (still we did it and succeeded).
The only issue was with the WiFi. It was switching off on my phone after several minutes. However, if my laptop was connected, WiFi was working on all devices without interruptions. I can't explain this fact but this is what I have noticed.
Valerio also offered me to check out later and it was super helpful and nice of him.
Personal recommendation: go to eat to the restaurant that is located just downstairs, it's amazing.