Let's start with the positive things first. Jack's unit is perfectly located within walking distance to a number of attractions, restaurants and has great access to public transportation system. The house is also architecturally stunning and the room is sizeable with nice layout and a sizeable balcony - definitely has a huge potential of being turned into a great Airbnb unit. However, I suspect that it was Jack's first time offering up the place on Airbnb and hence may not be too familiar with potential guests' expectations. I have since dropped him a note on potential areas that can be improved further ranging from general cleanliness of the room and house, better quality and clean towels/beddings, and since the bathrooms are shared, clear markings of soap/shampoo that can be used to avoid using those that belong to his housemates. by tackling those issues, this can easily be a 4/5 star offering.