I strongly recommend 5 stars.
First of all, the location of the dorm is so nice.
You can walk to London Eye, Big Ben, and Tate Modern, and you can walk to Soho Street.
It's very close to the station.
The room was in great condition, and the bathroom was clean and nice. Cats are cute, too.
The hosts were so kind and I was worried that it was a railway strike, but it was great that they found the way.
It's a place I want to visit again if I come to London again!