Andre's apartment is a typical for this area and in a fantastic location!
Yes the walls are thin, but it's the local style, and is outweighed by the other benefits.
Located literally 5 minutes hill climb from Santa Apolonia Metro station and in the eaves of the Panteon Nationale, I never got lost as it's such a well known landmark. Alfama is the perfect location for a Lisboa newbie like me, and the flea market on Saturday and Tuesday, around the corner was amazing! I recommend the local old cafe in the square, on the arch side of the indoor market building - so friendly, tasty and incredible value.
The boiler in the apt is small so make a quick shower if you are a couple, and it was a bit chilly in February, but Andre kindly left a heater which did the job fine. It's not frills, but has the basics you need, a classic Airbnb.
I would recommend Andre's apartment.
Thanks for the stay.