Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Jillian Michael's best DVD yet!

I'm not a fanatic workout-holic, but I do go through my phases of working out. My problem is that I'm impatient. Like most people, I want to see results quickly so that I get motivated to stick with the workouts; and I also don't want to spend more than 30 min exercising. I have to say... this DVD was a pleasant surprise. The workouts are short and sweet, but you definitely feel 'em and see the results pretty fast (as long as you stick with the program). 30 Day Shred is as good as, if not better than, the Biggest Loser workout dvds.