Had a great stay in this flat. I spent 10 days during winter, working remotely and visiting Lisbon. It's a really nice space for a couple, and perhaps for a small group if it's for a small stay.
The apartment is very well located, the pictures are accurate and the view is incredible. Lots of sun in the mornings and afternoons. The hosts were really nice and helpful, everything was smooth.
What let down a bit is that the wi-fi wouldn't work properly, sometimes 10-15mbps instead of 215mbps. I have the feeling that the connection is shared by a few apartments. If I didn't have a mobile hotspot, I'd be in trouble.
The cleaning of the bathroom also disappointed, there are some clear mold marks in the shower between the tiles.
I'd stay there again, but making sure these were addressed beforehand.