The communication with Miguel was great, he is answering fast and precisely.
The apartment itself is perfectly located in the lovely district of Alfama. It's perfectly clean and well equipped. You really have everything you need at hand.
It also has a beautiful small terrace which was a big plus.
During our stay it was quite warm at night despite the available air conditioning downstairs (the bed is upstairs) - but that's quite normal since it was around 35 degrees outside.
I did not have the chance to meet Miguel, and the apartment seems to clearly only be used for Airbnb purposes (like the whole building for what it's worse) which all makes the whole experience a bit less "authentic".
However for all the above mentioned reasons I would still strongly recommend this place for a lovely stay in Lisbon.