This is by far the best place I've stayed at in Lisbon. Why? Because it's quiet, yet super central. Much quieter than many small-town places I've stayed in. So many good restaurants and Rua Dom Pedro are in short walking distance.
Also it's bright, has a gorgeous view, well, actually two views. And all the critical amenities are there: good internet connection, washing machine, small but functional kitchen, kitchen table to get some work done, comfy couch. Oh and I slept really well on the mattress. Would gladly stay here again.