Helena's apartment is definitely a value-for-money choice. On the plus side it's close to a metro stop and it's near a busy street with shops and supermarkets, though it's far from being an upmarket location. It also has heating and air conditioning (we've been misled about this in other Lisbon apartments which have only small, electric fan heaters).
From the main street, though, it is up a steep hill, and then there are five flights of narrow stairs to reach the apartment.
Having said that, we stayed here comfortably for two weeks and you get what you pay for. It also has a small balcony to the rear with a view over the city. There is a dropbox for the key and although Helena could sometimes be slow to respond, she did answer our messages.