My wife and I stayed with another couple for a 4 day break.
A truly wonderful, spacious and well equipped apartment set in a great city location. The pictures hardly do it justice. Minutes away from the smart shopping and restaurant streets and 5 minutes from the Barrio Alta area which has funky bars and great small eateries in the evening: plus easy access to Rossio station and also the Alfama & castle areas only 10 minutes’ walk away. Given the location the apartment which is on the 4th floor is really pretty quiet, as long as you keep the windows closed; a light sleeper, I had no problems.
The only slight negatives to our stay were the result of the meanness of the management company Ines. On arrival we were provided with only one body and one face towel per guest nothing in the toilet for the sink to dry hands & no kitchen towel to dry any dishes. No more will be provided they told me by phone. The only soap provided is in 4 small sachets – the type you might get free in a magazine. No washing-up liquid, no tablets for the washing machine and no proper soaps, no sugar, salt etc. Usually with an AirBnB there is a minimal amount of starter items – but here nothing, and Ines told me that this was their policy. It would have been good to know that in advance.

That said, provided you come knowing you will have to shop day one for even the basic items you will need, this is a great apartment at a good price.