This place is great. The view is every bit as good as it looks, even better, as you get a great look at a castle, the river, a couple of old cathedrals/churches, and the spectacular 25 de Abril Bridge. People take taxis up to the park that's 50 meters from this place just to get the same view that the apartment has. Take a half an hour on your first day here to walk down the hill and find the local grocery stores and cafes and bakeries. It's all there, and it's easier to find on foot. The streets on the hill are small and winding, so we relied heavily on Google Maps and if you don't know Lisbon, I'd recommend making sure your smart phone can do that in Portugal.
But again, wow. Great view. Nice, helpful hosts. And lots to see in Lisbon, Sintra, Porto... I hope to get back there. Great country, great place.