The apartment was nice and clean, plenty of room for two people. It has all the necessary equipment and you won't miss a thing (TV, air conditioning, plates, coffee maker etc.).
It's fairly close to one of the train stations so you can walk up the hill or take a bus. There's a supermarket near by.
Ana Sofia was a great host and she provided some recommendations for sight seeing and eating - which turned out great.
I would recommend this place to anyone visiting Lisbon.