The apartment is in a great location, placed perfectly for visiting the different sites of Lisbon. We used their airport shuttle service which was fantastic and made arriving and finding our way to the apartment a lot less stressful. As soon as we arrived we were showed around the apartment and also sent an email with all their recommendations of places to visit and eat- I cant express how much help this was!
Unfortunately the fuse on the kettle blew and we lost electricity briefly but Elsa and Rui were very fast at responding to our messages and we had electricity back in no time thanks to their help.
Only thing to keep in mind is there are quite a few flights of stairs up to the apartment, this wasn't a problem for us and wouldn't be an issue for most, however if you are less able and struggle with stairs I would take this into consideration.