This is a perfect hub for exploring Lisbon, especially the historic area of Alfama.
A few things to note are that the apartment is small, which makes it very cozy and perfect if you just want a place to sleep after exploring Lisbon. There are also a lot of stairs and steep stairs in the building and local area, so you need to be comfortable with this to make the most of an amazing area of Lisbon.
Staying here really does feel like you're getting an authentic experience of Lisbon/Portuguese lifestyle.
If you're fit, happy to take stairs and want to explore Alfama, this is the perfect apartment.