No further reading needed - just book it.
My boyfriend and I had a lovely stay at Joana's over the weekend. She was very helpful to get us checked-in and settled. The flat was just as described and looks even more charming in real life than in the photos. It is in short walking distance to a number of restaurants, cafes, and a super market if you're planning a nice eat-in.
We definitely want to come back to Lisbon when the weather is warmer and hope to stay at Joana's again.