exercise on the rebounder

I can bet many people don't have a regular exercise routine. When I say 'regular', I mean doing it consistently on a weekly basis, not one every two weeks or once a blue moon. My DH is one discipline guy who exercises every morning without fail - rain or shine. He usually starts with a 15 minutes on the rebounder, as seen on tv. I cannot tell you how easy it is to exercise with a rebounder. And all you need is 10 - 20 minutes a day and you are doing your heart and waist a great favour. Do you know that this is easier on the knees compared to jogging?