We had a great stay at Catarina and Antonio's place. The apartment is in great conditions, clean and exactly like shown on the pictures. They provided us with all the information needed in regards of directions and places of interest. They were also super nice in accommodating our check-in and check-out time which were out of the regular time. We really appreciated it, as were were able to make the most of our time in Lisbon.
The location is very centric, close to many of the main touristic points and transportation. The only comment is that the area may not be the best if you are looking to have nice places to eat or have a drink close by.