Overall I liked the place quite a lot. It is located in a residential / business district, which means you get the Lisbon feel of the people who work there. But you have lots of hip restaurants and pastries nearby.
The apartment itself is pretty much as in the pictures. It is cosy, modern and clean. We were four and we didn't have an issue, and the sofa bed is surprisingly comfortable and roomy. The downside was the air conditioning, which didn't seem to work properly and didn't cool down much (which you'll want to have during summertime).
Ana was also nice to us, even though we didn't much help to get around :)