One of my preferred hostel in London. Great staff, great facilities. There are tiny things that can make the life of any travellers easier: provided towel, soap and shampoo in the showers. The restaurant menu is good (pizza, Thai food). And you can even eat some pancakes baked on the spot for breakfast, all included. I spent a few days there between two accommodations and it made this uncomfortable situation very bearable.
More a pub than a hostel. Lucky you if you can fall asleep before the music stops (late in the night). And the dormitory is en suite. That actually means sharing a bathroom (with a toilet and a shower) amongst six people since there is no alternative outside the room. Very practical in the morning when one showers and another cannot wait any more... Unless the location is your main concern, I wouldn't recommend this place.
Huge dormitories over a pub. Very affordable... But there's at least two other nice hostels in the neighbourhood that are probably a better option.