I'm an experienced vim user who wanted to refine some of my existing approaches to vim as well as learn about advanced features. This book delivers on that in spades. Presented in a friendly, bite-sized approach that highlights not only individual techniques but how to synthesize them into the "vim way" as well, it's a pleasant read and beautifully explained, although you necessarily need to be interested in the subject matter beforehand. There isn't a better book for the purpose than this one, to the best of my knowledge. Plan on sampling and re-sampling the book over time.