Oswaldo's place was perfect, better than the description. It was extremely clean (the cleaning lady was just finishing as I had arrived early), very good location (walking distance to everywhere and bus /metro/train stations within a block) and fully equipped. It is perfect for a single traveler, a couple or a family of 3. I used it as my base for my days in Lisbon as I came to run the Lisbon Half-Marathon and I would totally use it again.
Communication was great and Oswaldo was there to welcome me and give me the keys. I had arrived somewhat earlier due to a change of flight but he was still able to accommodate me.