We loved this place for our three night stay. The views of Lisbon are amazing. Air-conditioning and washing machine are a big plus. The bathroom is very small but sufficient. The location is very central and we had no problem getting around by foot/public transport.
When we walked around the neighborhood at night, we felt somewhat weird/suspicious because there were no other women around, only men :D We haven't felt unsafe as women, but it's just something to keep in mind when staying in the area.
All in all I would stay here again when visiting Lisbon.