A good flat in an excellent location - you can walk everywhere from here, though the touristy tram does stop outside. The terrace is massive and gets the sun from about 11am onwards. The flat is in a gated building, which is very secure and makes the place feel very plush. It was just the two of us, but the flat is so big it could comfortably accommodate 4.
The flat is run by a private rental company, so not great if you want the 'real airbnb' experience. But we were given a map and a contact number to call if we had any questions. Loved the guestbook and the book-sharing shelves.
The flat has a Samsung smart TV with lots of channels, the wifi is v fast and works throughout. The bed is super comfy and the pillows were good, though we'd have liked a few more.
The only minor issues were the shower, which doesn't work properly, and the old dishcloth in the sink which stank to high heaven. The mezzanine floor could be made into a cosy snug, but as it is, it's just a random wooden platform in the living room.
Overall this is a fantastic flat with incredible views and location. Highly recommended. I'll be coming back to stay here if in Lisbon again!