This is a great workout.Jillian does a great job with explaining moves and why she is combining moves.I like how she says not to look for a modification on jumping jacks. It makes me chuckle every time.I work out about 5-6 days a week. I have not tried to do this work out for 30 days straight. I do this workout about 2-3 times a day and I feel stronger and can make it through level one without feeling like I am going to die now.I think that next week I will try to move on to level two.The background music is very boring and not motivating, but Jillian's cues are on spot most of the time. She is encouraging, but not annoying.