The communication with Tania was really easy, smooth and quick. She is a really good host!:)
The apartment is well located, close to the attractions, the train station and also to the metro.
Is is very tiny as described, but be prepared that it is true! We were with to small backpacks only but with luggages it may cause some difficulties, because the stairway is narrow and steep- but this is true for the surrounded streets as well and for the whole Alfama area.
Someone mentioned that the Wifi was not working correctly, for us it was good, had no problems with connection.
All in all I highly recommend this place for a few days visit in Lisbon and Tania as a host.