Our four night stay at Rui's apartment was great! We really enjoyed the authenticity of Alfama. The apartment has a ton of stairs leading to it, but you are totally rewarded for all the climbing once you are upstairs and see the view. It is marvelous!
The communication with the host was quick and worked very well. Although we have not met Rui (his friend Mariana showed me in upon the arrival), he always reacted swiftly to my messages. Once I requested a second duvet and bed sheets, he brought it up to the apt on the same day. Thanks a lot for that, btw!
The place was very clean and well-equipped with all you might need for the stay. I think it is ideal for one to two guests, otherwise it might get a bit crowded :). From this place you can basically walk everywhere, and if you don't like walking (ehm, why are you in Lisbon?), you can always take a taxi (3 min walk to the street), bus (5 min to the station) or metro (10 min). There is a great variety of eateries, mini markets and fado places in the neighborhood. All in all, it was another great AIRBNB experience.