This is one place everyone in the World should visit at least once in their lifetime. I have visited it twice, it's a place of solitude and sadness. We could never know what sort of tragedy these people went through at the hands of the Nazi's. Blessed be to all those that died there.
I recommend renting bicycles if you want to see a few temples as the complex is quite big and it takes time to visit temples. Some of the temples are extra paid.