Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This is a joke.

Those 3 to 5 minutes routines are jokes. There is no way we can get "fit" in that time. There is no such a miracle. Definitely, this DVD does not worth the money. It might work for someone that has never worked out in their life. Maybe it is good just to start. The 20 minutes aerobics is not that bad if you don't have anything else to warm up with.