Most walkthrough I read where free with magazines, so I read them before I bought most games (most of them made me buy the games) but I only used them the first go, and what's good is that they didn't spoil. They where very careful about what they mentioned (this includes FFVII - However I did eventually get a hold of some FFVII walkthroughs that did spoil that scene, but that was after I had seen it so I didn't mind).