The apartment location is fantastic and its historical background is a unique experience. Nonetheless, we encountered a few problems during our stay. It looked like the apt was a bit neglected. In January the temperature inside the apt was 18 degrees, so we had to use the heater and also 2 dehumidifiers - that's understandable. However, one dehumidifier was leaking and another one was producing smell while working and had no filter. They also made significant noise. Considering also a few other problems (like exploited towels, dirty cutting boards, dust & spider webs on kitchen lamps), we decided to end our stay after 1 night.
Alberto was very friendly responsive and offered us a partial refund. He also made a visit to the apt to check all the issues.