Rating: 

I had heard a lot of good things about this book, but there's one problem: the way its chapters are arranged causes a big chaos into a begginer's mind. There are way too many examples in the first three chapters which involve arrays and objects, making it hard for you to understand the given examples.

There's also too much text which involves knowledge that you'll later achieve, so even the text will make it hard to understand.

These are its main problems. It's a definitive introduction, presenting too much information in an intimidating way, thus requiring the reader to adapt to the author's chaotic style.