I do not know what criteria to evaluate hostels by. But I liked it on the whole.
There is breakfast (£8), each bed has its own locker with a lock (the lock is purchased separately at the reception for £ 5). The floors are divided into two blocks, and in each block there are 6 showers (with normal distribution of hot and cold water) and 4 toilets.
It is a five-minute walk from the metro (Erle's Court). There are also many attractions within walking distance.
Since I came to sleep and have breakfast and wash, I liked everything.