This guide is a good buy, especially if you'd like to go through the game and get most everything on the first round. The maps are good and clearly show the placement of all the stuff you need. I had almost all of the Platinum Bolts and Nanotech Boosts when I finished my game using this guide. The layout is good, and let's the player know exactly what to do next. There are a couple of errors (some objectives for one world were printed again later for another planet) but that detracted very little from the overall quality. If you're having problems with this game, or need help figuring out the Skill Points (I know I did) this is a good buy.
Some people say that guides take away from the experience of "discovery" in a game. To that I say "BAH!", nothing is more satisfying that getting everything you can in a game; and this R&C:GC guide will help you do just that! Buy it, and enjoy this great game!!