I’m going to Lisboa at least once a year and I highly recommend Elsa and Rui’s place.
It’s perfectly clean and in a perfect location (less than 10 minutes walk to buses and tram and really close to the famous Pastéis de Belém).
It’s a quiet and charming neighbourhood.
The communication was perfect and the suggestions very interesting, even for someone who knows the city.
Go to Elsa and Rui’s place if you want to enjoy Lisboa. ;)