This is a comfortable low-end apartment. It's OK for its price, it has all the basic things, just don't expect anything fancy. Some of the furniture and appliances are worn out, especially the sofa. It was not super clean when we arrived, particularly the floor which was dusty. It has an elevator so it's good if you have a stroller (there are a couple of steps in the building entrance but they are easy to bypass). The location is good, very close to Trindade metro station (all lines are there, including the ones to the airport and to Gaia), and within walking distance to essentially any place in downtown. Check-in time was a bit late and restrictive (16-18h) but it was OK for us.
In summary, this place is good if you're looking for a low-end affordable apartment in a central location. I would definitely return.