The location is perfect, historic and picturesque. The view over the neighboring rooftops is rare. I wouldn't recommend overloading the apartment with more than 2 guests. I would strongly urge you to try the kosher restaurants in the cross-street (not all are actually kosher though). This is one way to connect with the history of your surroundings when you stay here.
The reviews that mention being quiet should be taken seriously, as the construction of the centuries-old building transmits the noise to the neighbors below. This is a very special guest apartment, not your average AirBnB, in my opinion.