Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quite good -- if only there were more examples...

First, I unequivocally recommend this book to anyone who wants to learn the vi editor used on UNIX and Linux systems. The book is well laid out and well written.There are, however, two things I think would make this good book even better: (1) step-by-step examples of some of the more complex vi techniques and (2) some on-line example files available from the O'Reilly Web site. On-line example files are employed to advantage by other O'Reilly books (O'Reilly's "sed & awk" comes immediately to mind). Providing some hands-on example files to work with would definitely help anyone using this book to learn the vi editor.Having said that, this book in its current form will teach you more than enough to use vi effectively. For those who are just starting to use vi to do real work, I'd also recommend acquiring the companion "vi Editor Pocket Reference."