Not the best for young people due to location and people there.
Great hostel with many facilities like pool, bar and cafe. Felt like a villa but there was very few young people there when I was staying (19M) and the main issue being you are 40min away from the centre so nights out and exploring Lisbon is very very difficult and sometimes pointless in the heat.
from that it was great they put a lot of effort into the venue but not so much in the comfort of the beds unfortunately.