Yes. All the rooms.
Yes every single room has its own toilet, shower and washbasin. This is different to many hostels, which is why it will always remain one of my favourites! It's just so convenient!
And if you find that your shower room is occupied, you can use the toilet downstairs, or ask to use someone elses (which was often the case)
Get an answer from Absoloot Value Accommodation staff and past guests.