My husband & I stayed at Claudia's apartment for 3 nights and it was fantastic! Its in a great neighbourhood up high with some great viewing points over Lisbon and whilst the apartment street is lovely and quiet it is very close to a main Rd (Rue de Graca) and from there it's a short walk to restaurants, grocery shops and only a 10-15 minute walk into the centre of Lisbon (Rossio & Restaurantores). Equally you can catch Tram 28 or 12 if you don't fancy walking back up the hill after a day of sightseeing!
We also liked the fact that it was super close to the funky Alfama neighbourhood as it made watching Fado one evening very easy.
We were a little concerned that there was no aircon in the apartment because the weather was warm but once we opened up all the windows there was a lovely breeze and we slept well, especially because the bed was so comfortable!

Claudia was lovely to deal with and sent us a detailed map of how to get to the apartment from the airport. She also had the room ready early and contacted her sister to welcome us on arrival (she lives next door). All in all a very pleasant stay especially for the price and we can highly recommend!