An amazing location and good value. The building is gorgeous, the flat and the room are nice. Clean and equipped, as described. The cleaner comes every morning for the shared spaces, as they do not look their best at the end of each day.
Make sure you understand the tourist tax thing, it is not clear from the beginning that you have to pay extra and they do not respond when you ask for more information (e.g. I went for a conference, I was not a tourist). Also, make sure to diligently lock your room, as the door lock of the flat did not always work... The check-in process requires submission of passport photo, the host does not check it in person, detail important to know if you are concerned about your personal data safety. I would personally prefer to have avoided it.
Apart from that it was nice and I would recommend it for budget travelling.