Mario’s apartment is great. Right in the middle of Chiado area. Within walking distance to all tourist areas. Please note Lisbon is made up of many hills, so put on your walking shoes. Like Porto the sidewalks have cobblestones but they are even and smooth, easy to walk on.
The place is very clean and nicely maintained. Air conditioners and controls for living room, and each bedroom. A great feature in hot Lisbon days.
Mario is easily accessible by message and responds promptly to any question i asked.
Taxis go up and down the street for you to use or uber.
Pastry shops and small restaurants for quick bite are a few stores down the hill as well as a small convenience store for water, eggs some vegetables etc.
i would highly recommend this airbnb.