" As a resident of many camps, I can say that Guzen was the worst.
This is not to say that the conditions at the other camps were not dreadful.
Compared to Guzen, however, one might almost say that those camps were paradises.
The proof of this might be that Guzen was one of the least known camps.
This was not because it was smaller than the others - it might even have been the largest.
It was unknown simply because very few of the tens of thousand of prisoners sent there
remained alive to tell the story of its horrors."
(Rabbi RAV YECHEZKEL HARFENES
(when back to Auschwitz) in " BeKaf HaKela" (Slingshot of Hell),
Targum Press, Southfield Michigan, 1988).