I prefer the timed intervals of working, compared to struggling through reps. I like Synergy Kettlebell Boot Camp and for me it makes the act of exercising a lot better when I am in the group then when I have to bear through it alone. In the past I have gone to yoga & pilates classes, but I never really liked them. They were boring and I quit in like a week after starting. Overall I think Synergy Kettlebell is great!!! Thanks for helping me drop 60lbs! -Judi M.