My parents came to visit me and they stayed at Rui's place. Both Rui and Tiago are very nice and friendly. Tiago welcomed us very well and showed us the home and also parking place for the car (if you have a car it is really helpful because it has a special indoor parking). The house is located in a very good neighbourhood. It is at one paralel street of the main street (Avenida Almirante Reis) and very close to the metro station Arroios (1-2 mins walking). You can take the green line from there and reach to the city center in 10 mins. Also there are lots of nice restaurants and supermarkets around so that you can have a dinner there without touristic prices and enjoy the time in the city center later. During their stay, my parents loved to stay there a lot. It is a very nice and cozy place to stay. You can find all the necessary equipment in the kitchen. I would definitely recommend you to stay in Rui's place, you won't regret it :).