The apartment was as Sam has described it, but just a little darker. There are only a few windows, but since we have been in the city or on the beach during the day, it was no problem at all.
Being right in the heart of lisbon was a big advantage for us. We only had to use the subway a few times. We almost stayed three weeks so after two weeks Sam brought us fresh towels and bed sheets, which was really thoughtful of him.
The kitchen is huge and we used it quite often, there is everything you need.
The only disadvantage of the apartment is, that there are several bars around it and if you leave your bedroom window open it can get loud sometimes. But as soon as you close it, it's fine to sleep (although I still slept with the windows open, but I have a deep sleep (: ).
Me and my friend would definitely recommend Sam's apartment (: