Very high quality for the price. Facilities are cleaned, beds are comfortable and you will certainly have enough private storage for things. Great location too, close to a lot of attractions, 5 minutes away from barrieros boats and also right near the pink road.
of course the main complaint would be with the costumers themselves, you might have troubles falling asleep due to other people talking at 4am, or people not wanting/wanting the ac while you do/don't but this is not of the fault of the establishment and is just part in parcel to the type of service. If you're comfortable with sleeping in a dormitory and want to meet new people this is the perfect place to do so in Lisbon