Instruct: Classify the given Amazon review as either positive or negative.
Query: A trainer gets trained

I'm a personal trainer working in a New York City gym and when a client of mine wanted some exercises for his favorite sport, I did a search and found this book. It has been excellent. All I needed to tailor a program for him, and even exercises he can do on the mountain in full gear. Clear, honest and effective. I highly recommend it.