If you want to be in a central location with lively street scene, this is it. If you want quiet, this is not it as there is a bar below and can sometimes go late into the night. 1 block from the river, 5 minutes to the best restaurant street (Rua De Flores), you are really in the heart of the Ribeira District.
The studio is bright and airy. A nice kitchenette is appreciated. Beds are comfortable and wifi is decent.
My only criticism is the noise from the bar below on Friday night was excessive (seems to come up from the stairwell) and the occasional ambulances that go by are annoying. Other than those items which are the penalty you pay for being in the heart of a central night scene, it's a really good place.