I had a pretty good time in Lisbon while staying at this apartment. It is well-located in an up-and-coming little neighbourhood - there are a lot of great restaurants and bars within a 5-10 minute walk. The apartment is laid-out well, but if you're a bit taller, watch your head on the sloping roof and in the shower.
A couple things to note, though: the walls are thin, but the neighbours are pretty quiet; much like the rest of Lisbon, there is a bit of a climb to get to the this top-floor apartment (4 flights of stairs).
But overall, a great stay and would recommend.