Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My Backsmart review

I decided that the book deserved a 5 star for it's thorough coverage of exercise and weight training. In that sense, the workouts covered are good for everyone, no matter what eating plan they are following (as long as it's healthy). Maybe that's even better. If you are following an eating plan that makes sense for you, is healthy and varied, and are ready to add weight training into the mix, this book is for you.If you are ready to even take your routine up a notch, are doubting your form, are not seeing the results you wish, then this book is for you, too. It's great. It's as informative as Body for Life by Bill Phillips and as well written which I used for over a year. Additionally, The Backsmart is more flexible with the workout routines and exercises, and explains how to vary them. There aren't a lot of books for beginners on this subject. And, again, this book isn't just for beginners, it's really for anyone interested in fitness. Completely recommended.