We stayed for 2 nights in Tiago's apartment. It's very modern and well-equipped, even with air conditioning which is great in Lisbon in the summer months. The apartment is clean and comfortable and Tiago was very welcoming - he even left us a bottle of port and some chocolates. Public transport is close by - bus, tram and train - and it's close to the famous Pasteis de Belem bakery :-)
We enjoyed our stay and would definitely stay here again.