Small and perfectly formed, the apartment has everything you could need, was spotless, and feels very homey.
There is humidity, which i think is an issue everywhere in Alfama, but there's a dehumidifier which does a great job of dealing with it - and it's a small price to pay for being in this historic area of Lisbon amidst the locals and the Fado restaurants.
You should be aware that there is a walk either up or down quite a few stairs (or one longer steep slope) to get to where you could catch any form of transport (which was interesting for our 4am departure).
We really enjoyed our stay, and the apartment quickly felt like our Lisbon home. Tomek and Mariana were great at communicating, and even though we had no issues whilst there I felt they would be right on it if we did need anything. The self check-in and departure were really straightforward as well, and both work if you have awkward hours or arrival / departure.