The room was small but ok for three. Only negative point to mention is the "couch" for the third person which was only an air mattress and not very comfortable.
The kitchen had everything we needed, there could be one or two more wine glasses :)
The location is perfect for reaching almost everything by foot and it feels like you are a local. The "strange boys" in the neighborhood indeed made us a bit nervous but we always returned from another side so we never passed them.
All in all good location for a few nights in Lisbon if you do not spend much time in the apartment.