Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So far so good

I am overweight due to a recurrent knee injury. This workout has been great for me b/c it doesn't involved deep lunges and squats or a lot of prolonged kneeling positions - moves I cannot currently do w/o further injury. I've only done it a few times but I already feel stronger and my legs feel tighter. The abs section is murder! This vid combined with some other low impact cardio gives me some hope for getting into shape again.