We stayed 3 days in Catarina's flat and we loved it! It's cozy, luminous, you have everything that you need, even maps. The bed is super comfortable. Around, you'll find nice cafés for the breakfast, a very good restaurant where you can listen to Fado. In 5min you can walk to some central areas of Lisboa. You might have to walk more (20min) to reach Praça do comercio but you'll be happy to find this peaceful flat after a lively day. Strongly recommend!