This apartment is in a great location - the building is at the end of a quiet cul-de-sac, but very close to two Metro stations and several supermarkets (all within about 5 minutes' walk, or less). It is also within reasonable walking distance from the city center (~20-25 minutes from Rossio / Martim Moniz).
The apartment was recently refurbished and is rather nice, albeit quite small - but perfectly fine for two people staying. As mentioned in the listing, the stairs (almost a ladder!) that lead up from the kitchen/bathroom/living area to the bedroom are very steep - even a fit and well person would need to be careful, especially when descending. The mattress on the bed in the bedroom is almost new and quite comfortable, but has connected spring / coils (so a person moving on one side may disturb the sleep of the person on the other side). There is everything necessary for cooking a meal in the kitchen.
We've never got to meet Cláudia and José, but they were very friendly and responded to all our queries really quickly.
Overall, we've had a good relaxing stay in this apartment.