Joana is a lovely host and her apartment is beautiful! Walkable distance to pretty much everything you need, cabs are extremely cheap in Lisbon and you can get the tram to lots of cool places from near the house. Loads of great bars in the area with friendly staff. Short walk to a pretty lookout point to see the bridge and Jesus statue in the distance, also a nice place to have a few beers with the locals.
Only downsides to this apartment are the heating - we came in January and the apartment was freezing cold the whole time. Heaters were provided but unfortunately didn't do anything to keep the place warm. Also the front door to get in is an absolute nightmare - it took us a minimum of 10 minutes to get in every time we left... All 4 of us tried each time but it's a very tricky lock.
Either way, we loved being there for a long weekend and wished we could have stayed longer!