I generally enjoyed my stay here. The location is great for experiencing the heart of Lisbon and getting around to a lot of the major attractions (and Uber's a pretty cheap for anything that's longer distance). Despite the character of the area, it was noisy at night so this is something to bear in mind. There is a restaurant right outside and often live music at night - this could be attractive to some however. The noise was normally wrapped up by midnight but I did experience noise from neighbouring flats later on that sometimes woke me up.
I stayed here on my own and there was just about enough space, although it is a rather small space and two people might struggle if staying for more than a few nights with more than a small amount of luggage.
It's quite basic and dated but it has all of the essentials and was clean enough. The Wifi service wasn't great and appeared to be insecure so this is also something to consider.
One the whole this is a decent place that's perfect for a few nights, especially if travelling alone.