We stayed 7 nights here in July 2019, and it was perfect for us. (I was traveling for work, and my 6-year-old son and 76-year-old father joined me, thus requiring 3 bedrooms.) The location is truly excellent--from this location, you can get almost anywhere easily (with quick walking access to most of the subway lines and just about everything else). The flat itself was well-kept, beautifully decorated, functionally extremely comfortable, and a delight to live in. The large windows, when opened, provide a lovely cross-breeze almost any time of day, and when it gets hot, the air conditioning units (a split unit with 1 in each bedroom and 1 in the main living area) work very well. There is a supermarket a couple of doors down (that also has some great Asian street food) and several others (including an organic grocery) within a 5-minute walk. The kitchen is fully functional--we cooked in the unit with great success--although there are also many, many great restaurants within close walking distance. Internet was reliable and fast. And their book of recommendations kept us happy throughout our stay.
From the flat, you have a view of Martim Moniz square, including the famous 28 tram. Even so, with the windows closed and the roller shutters closed at night, the place was wonderfully quiet (even the one of us that is a light sleeper slept very well).
Manuel and Madalena were a pleasure to deal with--check-in and check-out couldn't have been easier or smoother.
All in all, a perfect stay. Next time I'm in Portugal, I would definitely stay here again.