As advertised, the apartment is in the heart of Chiada. Which is great to get around -- and also can be very loud at night. Not a problem for us but beware that there are people right outside the apartment at all times of day and night. The fact that the bathroom is downstairs from the sleeping area is a minor issue.
The hosts provide lots of helpful information about the area and Lisbon in general. A nice touch was also that they provided snacks, water bottles, and laundry detergent.
Communication were timely and concise. All in all, I recommend this apartment!