Adequate, but not fancy Room was actually pretty clean, and restrooms were heavily used, but cleaned regularly. Staff was always very nice and helpful. Room was spartan, but comfortable. Very noisy - lots of commotion outside our room.
Also, for some reason, they decided to shut the bathroom near us for cleaning every morning from about 7:30 to 8:15 - right when lots of folks were wanting to shower. Finally, I had requested a private room for our family, but they told me that they didn't have any, so I had to pay extra money to get a whole 10 person room. Still a decent rate overall, compared to other places, but not the rate i thought I would pay.
Finally, don't count on getting wi-fi any time between 7:00 and 10:30 at night. There are so many people trying to connect that it is pretty much impossible. You can find way better I liked that it was well located (less than 10 minutes walk to the Elephant & Castle tube station), St Pancras train station is 15 minutes away by tube and there are many buses around the hostel. You can also find a Spar and a Tesco Express supermarket as well as many kebabs next door if you want to grab something to eat. I stayed in a 4 beds dorm wich was clean and I had a nice view on the Shard. Toilets and shared showers were clean too.