I have tried so many different exercise programs and always approached each one with intensity that only waned as the weeks went by. I intermittently used a spring rebounder that really was unsatisfactory in performance but I really liked the concept and the benefits. Then I happened to come across a bellicon ad, got very intrigued but agonized over the purchase. It took me 6 months to take the plunge and make the purchase. I am ADDICTED! I bounce every day for an hour! I can't wait to get home from work to bounce! It is so much fun that I was skeptical about the real benefits. My doubts were unfounded. Thank you bellicon!