This is an old apartment with Ikea stuff.
Well, I won't recommend it for a long stay or stay with kids.
One of the bedrooms is not suitable for sleeping at all, as it is cold and noisy because of old windows.
This place is not far from city's attractions, but there is nothing to do with kids. No parks, playgrounds, no supermarkets.
It can be an option for a short stay if you came to visit Lisbon's attractions.