I really loved staying at Mariana's house. It's a beautiful authentic house in Portugese style. The room is very nice and cosy, with all the things you need.
Location is good, public transport is nearby, supermarket, restaurants and city center is a walk of about 10 min.
Mariana is a very kind host, very helpful and I felt at home straight away.
I loved it that much, I would definitely stay here again when I return to Lisbon.