This is a unique and delightful apartment. Three of us stayed very comfortably (my wife and I in one large bedroom, a friend in another single bed bedroom), and there was still an unused other bedroom with two beds in it. The location is great, pretty much in the heart of the three cities as I understand it, very good restaurants right down the street and a 5 minute walk from the ferry that can take you to farther destinations. Apartment has a smoker-friendly balcony which can be closed to the inside but open all around to the street air, and a roof lounge with a great view. Amenities are all modern and comfortable.
I would only warn about two things:
1. We had difficulty getting here from the airport via cab. The address doesn't seem to come up in local GPS systems. However, this can be easily remedied by arranging a ride from the airport with the host and housekeeper, they work with a driver who knows exactly how to get there and will pick you up at the airport.
2. During rainy weather the stone steps can become wet and slippery, take care going up or down in such conditions.