Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Definitely worth the sweat!

As an avid "workoutaholic," I am always skeptical about whether or not a workout will truly challenge me. Well...after only week 2 of this dvd, I am no longer skeptical about JM's promised to kick butt! I can only imagine what the week 4 workout will do to my muscles. This dvd is awesome because it gives you 4 workouts that progress in level of difficulty, and JM always provides modifications for each move. So, basically, there is no excuse for not being able to do each workout. She's also quite entertaining, which helps you work through your sweat. If you want to challenge your body to reach its potential, buy this dvd!