If this is your first time in Lisboa, Alfama is a wonderful neighborhood to stay in.
Pros:
This location is right by all the Miraduoros and the Castelo de Sao Jorge and a reasonable walk from the Baixa-Chiado district where a lot of other action is happening.
Diogo was a very thorough communicator and provided us with many recommendations and helpful suggestions which was very appreciated.
For the space itself, the backyard was our favorite.
The stairs are pretty narrow and a little bit tricky to get up and down, but the bathroom and the bedroom are on the same floor so overall not terrible.
The space also has everything you could possibly need cooking and laundry wise which was great as well.
Cons
There was construction going on during the day but it started and finished at reasonable hours so it was not too disruptive.
The space inside is not very big so if you are 2 people or more working from home, it is a little bit of a challenge
We had a big of a snag with check in, check in was an in-person meet up only with no contactless options. I think if you can make this work for you it's really lovely to have someone show you around the apartment and answer your questions in person, but for us it ended up being pretty stressful trying to make it to the meet up (this was partly due to us mis-reporting when the bus would arrive but worsened by our bus arriving much later than expected).