Amazing apartment, really beautifully decorated, fast wifi and would 100% stay there again.
The only thing to note is that it's quite small (in my opinion is smaller than what it looks like in the imagery). We were two people (a couple) so it was fine for us, but I would not recommend staying there with more people for an extended stay beyond just a weekend as you'd likely feel on top of each other.
The location is also great as you're in the middle of everything and a very short walk to the main neighbourhoods of Bairro Alto and Alfama but do note that the apartment is on one of the main streets with lots of restaurants and shops (as shown in the images) so it's very noisy at night. We needed to sleep with ear plugs as people hang around even after everything has shut.
With that said, the host is lovely, it was still a great stay and I would definitely recommend, as long as you're okay with the above considerations!