Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Wow, this was hard!

Jillian Michaels - 30 Day ShredI just did the level 1 workout for this DVD and it was SO hard!!! I hate to exercise but really want to get in shape for a friend's wedding this summer, so I purchased this along with one of the Biggest Loser DVDs. Wow. I was dying after the first 6-minute circuit and it only got harder for the last 12 minutes! Jillian really packs it in--you have got to be motivated or pretty fit to stick with it the whole 20 minutes. But, like she says, you have to work to get results.I thought this was a really good workout for people who are serious about getting fit. Make sure you have a soft surface (like a mat) and some light dumbells before starting this DVD.