I had never purchased a Jillian Michaels DVD before b/c of the hit or miss reviews. So when I heard raves about this one, I decided to give it a shot and I am so glad I did. This is an absolute butt-kicker workout. I am an intermediate/advanced exerciser (I work out 5-6 days a week) so I figured I could see what Level 1 was all about and move onto Level 2 right away. Listen to me folks--these workouts are HARD. Level 2 was VERY difficult--a good difficult though, very challenging. When Jillian tells you to start at level 1, listen to her she knows what she's doing. I've been at this for about 5 days, and I already feel a difference in my body. Jillian is tough--absolutely NO rest in this workout (not even for a sip of water) but that's what makes it go by so quickly, and it makes your body change, according to Jillian. You're done before you know it--but by the end you've gotten a kick butt workout and feel like you've really done something. She bases her workout on the 3-2-1 method: 3 mins strength, 2 mins cardio, 1 min abs. Her strength circuits remind me of Jari Love--compound exercises that work the upper and lower body simultaneously. The cardio is good as well: a lot of jumping, so watch those knees (she has a modifier for beginner and lower impact) And the abs is straight up ab work--a variety of crunches and twists on the floor. This is a great workout and I find Jillian to be tough but she's pretty likeable. Be warned though: she's no-nonsense. I think it's funny when during the stretch she admits she's not flexible and struggles to reach her legs on the floor. I thought "Ha, Ha, finally something I'm better at than Jillian!" lol If you really want to get a good workout and to jumpstart your weight loss get this DVD you will not be disappointed. It's great for those who are short on time too and want to try something new; every workout is just under 30 mins!