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

The material content in these recordings is outstanding. It is a great teaching method, broken down in steps of difficulty, well illustrated and the instructions are very good to follow if you don't have any self defense background. If you do have prior training in any system, this is a very good add on to your experience. Any one with experience can see and analyse the moves and implement it to their workouts. I heard from an instructor once say that simplicity is genius, well, this system helps you learn simple techniques for multiple situations so that if you need to react one day, God forbid, you don't stumble and react out of muscle memory.