Great apartment, located ideally in the centre of Lisbon. Close to the castle, the main shopping area and (touristic) sites. It's got a great shower, good double bed, tv with loads of channels, is clean and has got everything you need when you're in Lisbon for a couple of days. We (couple in our fifties) were in the apartment for 7 nights and enjoyed it very much. It's on the fourth floor, so it might not be suited for everybody.
Rui is a very nice man, checking whether everything is okay and easily contacted. If there's a question or you need anything, he will deal with it quickly. He left some great tips of places to go and restaurants etc.
All in all: great!