I had in the past OSCP, CEH and CHFI training, all of them with a price range between 1000 $ to 2000 $...
I think there are no trainings on the market give us an "expertise" just at the end of it, expertise comes with experience and practice.
In my opinion a very good training must teach the underlying concepts, only on top of it I can build my knowledge and my expertise.
So my question is: why a SANS training is almost 4k $ more expensive than others? Which is the reason behind it, what concepts do they provide than other don't do?