This is an amazing penthouse - ideal for one or two people. My only concern would be for anyone who is very tall, as this is the top floor, and there are some sloping walls that you might bump into.
But beyond that the views are amazing, the bed is comfortable, the amenities were fine. The living room area is a little sparse, but when you have such amazing views of the castle and the city, you should just hang out on the deck anyway.
I didn't use the pool as it was winter. But it looked nice.
Great location, great views, great deck, comfortable and clean. For one or two people it is ideal for a short visit to Lisbon.