Miguel's place is in Graca, very close to the feira de largo flea market that happens on Tuesdays and Saturdays.
It's not great for elderly people or people not fit, as the hill can feel quite steep to climb up and down every day. Other people mentioned the hill, but I didn't realize how steep it can be when you go down to Martim Moniz versus going up to the largo da graca. Thank goodness for Uber in Lisbon for my parents, enabling them to move about more freely.
The rooftop view was simply amazing, well worth the flight of stairs to view it.
Miguel is an amazing host, very easy to reach via phone and airbnb messenger. I definitely enjoyed his wine bar downstairs.