I REALLY like the software, but the book is a HUGE let down. If you want to read through this book and follow it step by step as you build the example (a flying game), you will be disappointed. The book skips ALOT of steps. It starts out with simple step-by-step instructions, then it suddenly starts making large jumps and leaves you behind. The parts of the code that are explained well do not work properly (at least not on a IPOD Touch, even though the book says it should work). If you're a veteran coder, then you might not mind the jumps. If you're a beginner or novice, you will be frustrated. The book becomes next to useless because it starts out well and then basically skips to the end. It explains some code samples for touch input, but doesn't actually show examples of their implementation. In terms of the overall outcome, it reads like a first draft.