You can ALMOST survive on what they give you, but you WILL need to do outside research on some things, in order to 'pop' some of the targets, both in the lab, and in the exam. That said, though, they give you enough info to pretty much guide you where to FIND what you need, in the wild.
But one thing that makes it very realistic training, is that just like in a real-world pentest, you will run into things you don't know, and have to do some research on your own. That's one BIG reason I like the way Offensive Security puts their stuff together. It prepares you, not only to pass a certification exam, but for what to expect, in the real world.
~ hayabusa ~
"All men can see these tactics whereby I conquer,
but what none can see is the strategy out of which victory is evolved."
- Sun Tzu, 'The Art of War'
OSCE, OSCP (Former - GPEN, C|EH - both expiring / expired)