We had a lovely stay at Maria's apartment. The view is spectacular and it's set up perfectly for a couple. The bottle of wine is a nice and welcome touch; Candida (the local contact) was very friendly and spoke perfect English; the apartment is well equipped.

Two other things to note:
It's in a quiet residential neighborhood, with no nightlife and few restaurants. One charming cafe at the corner of Rua da Senhora do Monte and Rua de S. Gens serves everything from breakfast to late drinks. For more, you'll get to know the 28 tram route really well.
We visited in February and it got quite chilly at night; the apartment is on the top floor so exposed to a lot of wind. We used the extra heaters that Maria provided.

With that in mind, it's definitely recommended!