Vi had a very nice week in Casa da Saudade, we very much liked the appartment with the charming little terrace. The host was available and very friendly.
The neighbourhood is very nice, unpretentious and calm. Though very close to the trendy Principe Real. We went to the little charming cafe Canela down at Praca de Flores every morning for a nice bica (portuguese espresso) and a croissant :-) We also sometimes had lunch there. Though the kitchen in the appartment is fine for Cooking.
I will make sure that we can rent this flat next time we go to Lisbon, because we really felt comfortable there.