We really loved staying at Sofia' place. It's surprisingly large - with 2 bedrooms, a large kitchen, sitting room and a large bathroom.
The house is exactly as pictured - a nice self-contained space, with a big bathroom and all basic amenities in the kitchen (although we didn't cook).
Location-wise, it's in the heart of Bairro Alto - surrounded by many good bars, restaurants and bustling activity. This does come with some noise during the night - although one of the bedrooms is at the back of the house, and bars turned off their music at 1:30 AM/2 AM.
Communication was great throughout our stay. I would happily recommend Sofia's place for a couple, or a small group of friends, for a stay in Lisbon.