The definitions are not your typical dictionary definitions that leave you more confused after you've read it. They are simple and concise. Each word has a clear example that shows the word in context.
I also enjoyed that pronunciation was shown phonetically. I appreciated not having to flip back to a key somewhere in the book to figure out how to pronounce each syllable.
Overall, this book is excellent for anyone wishing to expand their vocabulary.
To its credit, this book does present the words in a manner that will help you to learn them quickly. It is also easy to read and if you can dedicate as little as 30 minutes at a time studying from it, it should expand your mind and ossify your loins ;^)