Wow! The views were really the highlight of our extended 3-month stay. Just be weary that it does come with work as the flat is on the 5th floor and there are only stairs. The flat had everything we needed, two bedrooms, separate toilet room from the shower room, kitchen, living room and dining area. As the flat is based in Mouraria, it's a bit of climb to get to the building if you don't take the escalator in Martim Moniz. Easy to get to the Linha Verde (Green Line) Metro which can take you straight to Cais do Sodré. Or walk through Rossio down Chiado to Cais.
We encountered some slight issues: the oven not working (it got fixed), December rains leaking through the ceiling, and water pipe issues from the flat above. Which is more to say that this comes with the maintenance of very very very old buildings in Portugal. Luis definitely made sure to follow up when it was possible and to make the fixes.
Overall, what a great time!