"Get what you pay for" sums the place up.
Rooms ok. Bed ok. Everything ok.
The hostel is on a very busy road (even for London standards) and the traffic noise is very loud throughout the night. A hundred yards up the road is a fire station, which was very popular, so sirens going throughout the night. Awful nights sleep.
Our particular room was also by the lifts, so experienced a lot of noisy passers-by.