I really enjoyed my stay at João's place. It was situated in a great neighborhood (Principe Real) which had some amazing restaurants and cafes. I used the Metro to get around, which was an easy 10 minute walk to get to the nearest station. There was also plenty of busses and Trams available. The area was peaceful and quiet, though accessible to the city (approx. 20 minute walk).
There is 2 supermarkets 2-3 min walk, so very handy.
The apartment itself is as described/ as in pictures. It is not brand new, but is very clean and tidy. It's great for solo travelers and had all thr amenities to cook in the kitchen. The bathroom was big and spacious. As others have mentioned, the bed is a little uncomfortable and you can hear the neighbors in the next apartments, so something to keep in mind if you are a light sleeper - was not a problem for me.
João was a great host, super responsive and kind.
Overall, I really enjoyed my time and would stay again when I'm next is Lisbon.