I did Callanetics for a while in the late '80s and found it very good for toning up my slim twenty-year-old body. I should never have given it up but I did... and now as a (very) overweight couch potato in my late thirties I have taken on the "Callanetics Countdown" as part of my intention to become slim again before I hit the dreaded four-oh. I heartily recommend this program as it starts off very gently (a much easier way to start than just launching into the Basic Callanetics program, especially for someone as unfit as myself) and you only step things up when you are ready to. Very quickly you can achieve more and see the results in the mirror - and also I am feeling so much better, more "aligned" in my spine, standing up straighter (and I've had a paralysing spinal injury & major surgery in the past so I really appreciate this!) and my balance and stamina have improved. I can do so much more than I would have though possible now. I'm still only on Day 20 so this is a real result for me. Looking forward to returning to the basic program in 10 days time and then stepping up to Super Callanetics! I'm really hooked now as I've seen so much improvement without risking injury to my vulnerable spine. I'm combining this with a diet and within just a few weeks I am now looking quite different. Rather than spot-reducing, I'm doing all the exercises each day, and the results are amazing. I've lost 18 of the 100 pounds I need to lose, and I'm feeling SO much fitter already. I wish I'd done this years ago. My doctor is almost as thrilled as I am! If a fat lump like me can do this, enjoy it, and succeed at it, then anyone can! Good luck!