We loved it!
The apartment was great, and exactly matched our expectations from the pictures.
It has air conditioning, which was a blessing during hotter days! We just got home, turned it on, and within a few minutes we were able to cool down and relax.
The location is great - we'd actually stayed in an apartment in the same complex before, so we wanted to go back to the neighborhood. Do note that the area has some very steep streets, but of course this applies to any apartment or hotel in the area and not just Francisco's.
But you're in the center, and it's very easy to get anywhere in the city. It's near Principe Real and Bairro Alto, so there is a lot of nightlife nearby. Despite there the apartment is quiet, and we never had problems with noise - neither from the neighbors, nor from the street.
The apartment looks like it was renovated recently, and has very a very nice tasteful decoration.
The bathroom, kitchen, and living room are on the ground floor and the bedroom is on the upper floor's mezzanine.
The host was there are the agreed upon time, so check-in was a breeze. He offered tips for the city and made himself available if we had any problems (we didn't).
When I contacted him to ask about checkout he replied promptly, and as there was no guest coming the next day he was kind enough to let us do a late checkout - which was really appreciated, as our flight was late in the day.
There were also some cookies and water bottles when we arrived, which was awesome as we'd just come from the airport and hadn't had a chance to buy anything yet :)
So overall a great experience with the apartment and the hosts, and when we go back this will definitely be at the top of our list!