We (two early 30s couples) thoroughly enjoyed our stay at Cristina's beautifully spacious apartment. Cristina met us upon arrival and gave us all the details we needed for our stay and tips for where to visit. She also kindly left some supplies for us as a welcome pack (coffee, milk, oranges and beer).
There are three lovely bedrooms - the two doubles are of equal size and the living space is comfortable and chic.
The location was ideal for us - bars and restaurants on our doorstep and we walked everywhere from the apartment within the city during our visit to Lisbon (which is quite hilly - don't wear flip flops). To get to the waterfront its around 20-30 minutes from the flat.
We would 100% recommend a stay here.