In the grand scheme of course you will get in better shape. It's maximum exertion exercise. Of course if you do 200 squats every day you'll have better legs than before. The question is if you want to shell out 3x the cost of a regular gym membership. However certain people will lose motivation for this program for reasons that I did: anyone with some history of training / anyone with a firmly logical mind will break down the components and find better use for their money. Specificity, it doesn't have it, it can't because they are group classes, trying to apply one curriculum to a wide variety of people is silly. Measurable, it doesn't have it, you will not be able to track your improvements in anyway other than losing weight because the exercises are always different. Realistic, possibly the most frustrating missing component. I lost count between the 100th and 200th jumping jacks, not that it matters because nobody is counting, the numbers don't matter and the time frames the person you are Paying to tell you are arbitrary. Just about anyone will lose legitimacy when they ask for 50 plyo push-ups at the end of an already hard workout. This adds another negative that it teaches people to cheat to get through the class. How long did you realllllly hold that plank position ? Alternatively if you found the inner motivation an mettle to complete the workout, then you probably don't need these classes