I picked up a copy of Wreck This Journal in a used book store, along with her Guerilla Art Kit. A couple of the pages were already wrecked, but it was mostly empty. I agree with previous comments that it encourages one to get out of their comfort zones, which is always a good idea, especially when you're exploring different techniques, concepts, etc. I flipped through to get some ideas, but I prefer to carry them out in my own journals. I think the main goal is to just engage with your journal regularly, and to stop being so precious about it.