Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Larry Mac does a great job.

Larry Mac goes a great job in telling what to do to get your car on the track. He goes into the set ups and does a wonderful job of telling how to do this stuff in layman terms. This winning former crew chief lets us see whats behind the curtain in the world of race car team management. Great read and great reference book. I bring it to the track with me every race.