Nietzsche stands as one of my favourite philosophers, and thinkers, alongside David Hume, and others. What makes "The Portable Nietzsche" so great, is in part accredited to Kaufmann's excellent translations, especially in "Thus Spoke Zarathustra". He captures the eloquence of Nietzsche's message and creates a smooth transition from German to English. If you are at all interested in Nietzsche, or would like to become more aquainted with his works I highly recommend this book. I must also agree with other reviewers that "Thus Spoke Zarathustra" must be read several times, though I suggest the first read to be casual, and to add scrutiny and critical thinking with each successive read.
Unlike a great deal of philosophers who appear stodgy, Nietzsche infuses his work with passion and fervour. His words are thought provoking, and in my case, life altering in a positive way. I don't know what else to say, other than this;
If you have had the urge to know more about Nietzsche and his works, continue on with it. I consider The Portable Nietzsche more of a manual of life than a collection of theories. For the most part, Nietzsche is the voice of common sense, but he would rather have you decide for yourself, I believe. Nietzsche is not for the faint of heart, however, and is shrouded in controversy over various topics, including, but not limited to religion, sexism and others.
In my opinion, the open minded reap the most benefit from Nietzsche's words.