I came to stay at Rui's place for a week for a conference at the university. It was perfectly functional for what I needed. The location was great - walking distance to the university but a short and easy tram ride to the centre. Rui is very friendly and helpful. He came to pick me up at the airport which made life a lot easier. In the apartment, everything was very clean and tidy and there was plenty of space. The apartment feels safe, (with very well locking doors). The sofa bed is as expected- practical, not luxury. Particularly when it is a sofa, it's a nice space to relax in. Aircon is another big plus. Overall I would recommend this place.