We stayed at Marco's place for two nights, and it was perfect for us! The location is amazing, minutes from the Duomo and shops, but still quiet and private. The building is beautiful and very old, which comes with some challenges. While we were there, the airconditioning was not properly working, and we had some issues operating the shower too (fluctuating from too hot to too cold). Marco explained how everything worked and was a good host, but when booking be aware that the apartment has its flaws, partly since it is quite small. These probably become annoying when staying for an extended period of time. That said, considering both the price and the location, it is definitely worth it.