Perfect and big apartment with a wonderful view. 2 min. walk to nearest metro and 15-20 minutes walk (or you take the underground) to the train station (Cais do Sodré) to get to the beaches.
You can reach Rossio and Bairro Alto (where you find a lot of bars) on foot easily. We stayed there one week and would stay there again - really perfect. We liked the neighborhood - some cafes and restaurants around - but not touristic.
We highly recommend this apartment.