What a great place to stay! The apartment was spotless and well-equipped and the hosts were super friendly. They kept in contact all the way up to and during the stay. What lovely people! The location is perfect - it is very easily accessible from the airport and has plenty of bars and restaurants nearby. It is very easy to explore central Lisbon from there either on foot or with the excellent (and cheap) public transport system. I recommend getting a 24 hour ticket as this includes the trams, tubes, buses and funiculars. There are some pretty steep hills! Rita and Miguel have compiled a detailed folder of information as well as other lovely touches. I also recommend the Discovery free walking tour (you should, of course, tip).
The apartment itself is on two levels - one with sitting room, kitchen and shower and the other with bedroom and shower. The bed was incredibly comfortable. The apartment also has heating, which was a must for us, as we had to dry all of our soaked clothes after a day in the rain.
I highly recommend the place. We will definitely stay here again if we return to Lisbon. Thank you, Rita and Miguel!