Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Great stuff from a guy who knows what he's talking about

I have read countless brand books, most of which are pretty average, but I put Brand Aid in my top three. It's real world, practical and insightful stuff written by a guy whose been there and done it. I would even put this ahead of books authored by 'gurus' Aaker and Keller because it is so practical. It's getting on a bit since it was published, but all of the lesson are absolutely applicable today. Great job.