We were hosted by Ines just for a week, but were filing like at home. The place is wonderful. I can say what its not a flat but its like the separate house in oldest (more than 500 years) district with original buildings. To discover Lisbon you don't need to use public transport (many seesights is near). But the one of the surprise was to have Saint Apolonia railway station and Metro just in 5 minutes by walk. And there's a luggage safe box here if you have a couple of hours before departuring. The apartment is really nice and affordable. If you want to see the Ocean just called Bolt or Uber - 40 minutes from apartment and you will testing octopus on the beach:)