One of the more affordable London options, however, it is fairly far out of the city center. There was throw up in the restroom and a cat walking into rooms of the hostel (although I am allergic). We were only given one key among 6 of us staying in a room and not given a code to get into the building, so were almost stranded outside.
Still, the host and others staying in the hostel were friendly. Would only recommend if you were staying for a short time, but I think there are better options.