Nice clean small apartment in the vicinity of several small supermarkets. The location is quite good - most of the sightseeing can be reached within 15-20 mins walking distance, no need in public transportation. The neighborhood is definitely not the best (I guess as in of small streets of Lisbon away from main avenues): lots of strangers, drunk people and gypsies that offer you some "shish/coca" every 50 meters.
Even though the apartment is relatively small, it arranged in a clever way with separation of small storage room, kitchen, bedroom and small living room.
We were a bit disappointed by absence of some kitchen essentials, like salt/pepper/sugar and olive oil, so that if you want to make at least breakfast yourself you have to buy this in the supermarket first.
There was no TV in the apartment and street view (if you can call it so) was very boring - there is nothing to do in the evening if you are not a "party-person" that came home late in the night just to sleep.
In general, the apartment is quite good for staying there couple of nights if you are considering this flat as a place to sleep.