The flat was fantastic: very well designed, perfectly equipped and efficiently organized so a family of four could enjoy a relaxing stay in Lisbon although the flat is not very large. There are all amenities you wish and the kitchen section even had oil, acid, salt etc. and coffee cups for the coffee machine were there as well. Our kids were impressed by the speed of the Wifi which was exceptional.
It is located in the very centre of the city close to many attractions, restaurants, small shops and only a 3 minutes walk from the metro. Nevertheless, it is very calm. You don't need a car to get around - it is even an obstacle because of the narrow streets and the lack of parking space.
The owner was very helpful and tried everything to help us: from printing out our lost tickets to calling a taxi when we left.
We never had such a good experience while travelling to a city and would definitely stay there again.