My boyfriend and I stayed 3 nights at Mariana's apartment. The location is perfect! right in the center of Lisbon. And even though it's in the center, there is no noise during the night :) you can have a great night of sleep. The bedroom is clean and tidy. We could cook without any problem.
Mariana is a great host, very friendly and thoughtful, she let some tips of sightseeing to us.
We definitely recommend her place!