Former hostel, with plenty of room, you have the place all to yourself. Rooms were spacious and clean. There were 2 bathrooms, but the ensuite bathroom had a sewage smell, so we chose not to use that room. For us not a deal breaker, but for a larger group it will be.
Very little hot water, so only 2 people could shower before the hot water ran out. Not a deal breaker either.
Lastly, apartment is on the 4th floor, with no elevator. That makes this apartment not suitable for older people, but like the rest of Lisbon, you have to go uphill most of the time.
We enjoyed our stay, and was a great stay for the price.