Paula & Alexandre's flat has an excellent location and is super comfortable. It is a 3-10 minute walk from many wonderful eateries and coffee shops. Furthermore the tram is just a minute or two away and the metro is about 4-5 minutes away. We wished we could've stayed a few days longer because we enjoyed Lisbon so much and felt quite comfortable at the apartment.
Alexandre was available and responded quickly if we needed anything. He also had lots of tips and suggestions for itineraries. Check-in & out were seamless as well.
Note to parents with young children: there is a steep staircase up to one of the bedrooms. However, there is a door at the bottom of the staircase, so we just closed it so our kids would stay off of it and it worked fine. At the top of the staircase there was a baby gate, but we didn't have to use it since our youngest can't crawl yet.