We stayed for 4 nights in mid October and the value was great on a dollars to beds ratio for four friends traveling together.
Location is very convenient to old town Lisbon, walk/ scooter/ cheap Uber-able to many attractions.
No A/C is something to note; as well there is a train line that runs directly outside of the building and is pretty loud- a cool location/ novelty, though.
Check in and communication very easy.