We enjoyed our stay in Lisbon very much and the appartement is just as described. The View on the castel is fabulous, the location is neat and it was very cozy. Thanks Tiago (Joao's borther) for letting us in and explaining everything and giving us some information and tips for Lisbon :-)
If you're looking for a nice appartement where you can cook and enjoy an evening at home and relax (it really is quiet!) but still be close to the centre - here you go!
Don't bother buying your groceries in the famous market - the supermarket downstairs seems to be cheaper and offer a great variety of vegetables & seafood. The metro is really close and the bus stops are even closer - but be metro is on time ;-) Enjoy your stay