Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Personal Trainer's Review

The AbMat is one the preferred ab tools by those who follow the CrossFit method of training.I use the ABMat in my own workouts and also with my clients. It's very convenient in that it is small and portable,compared to a stability ball that takes up quite a bit of room.You can "hit" all angles of your abs...upper, lower, and sides.Don't expect any "fat-loss" miracles, but this is a solid product that will produce results.The only reason that I don't give it 5 stars is that it seems a little expensive for what it is.,