The stairs getting up to the apartment are verrrry steep. And there are a lot of them so if you have a heavy bag or a disability, forget it.
Alejandra is a great host! Very communicative and sweet. The apartment is located near public transit and shops and restaurants.
Alfama is a bit out of way if you wanna do all things Lisbon by foot but again just take advantage of public transit. Alfama is a great place to see but a little rundown and loud for me.
I liked this apartment but I think I would stay in a different suburb of Lisbon. (And not on the 4th floor!)