Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What a workout !

It might take you awhile to work up to the advanced video - but once you get there you won't want to stop. You have to do this video in steps but once you are able to complete the whole thing you will get one of the best workouts ever released on video. You'll sweat, burn and yes sometimes even let out a yell ! But you will know that you made good use of your workout time and you will feel stronger and more fit. Billy Blanks is great !