This was our first ever experience using airbnb and we were really impressed!
The apartment was perfectly sized for my partner and I, and the location was lovely, only being a few minutes from the castle and the lovely area surrounding it. A note to consider if you're looking to stay in this area: it is very hilly - it can tire you out going back after a long day exploring the city, but we soon found shortcuts and lifts to get us around, and coming back to the apartment was a great relief - the bed was comfortable and the sofa large enough to lay on as well!
The apartment itself had everything we needed and was very stylish. Our only issue with the actual functionality of the place was that we found the shower temperature a little inconsistent at times - but once we got it going it was pretty much okay. The bathroom is also more of an all in one 'wet room' so some of your things could get wet if you leave them on the side. Another thing which confused us a little was that when we checked in at 3:30 we found the whole floor was still quite wet from where it had been mopped, but we gave the benefit of the doubt as we were happy to see that the place had been cleaned and everything else was fine!
Magda was a really helpful host and helped us out when we accidentally put the wrong code in the door one evening (apologies again!) and also sent us a really helpful list of things to do and places to eat, as well as a little outline of the areas/neighbourhoods of Lisbon which really helped us when deciding what to do each day.
Overall I would recommend Magda's place, we really enjoyed our stay and enjoyed having our own little place for a few days!