I have Needak Rebounder and love it.

Go to this site and read through the information.  They are not afraid to educate people on the benefits of rebounding.  They may charge a bit more for the product my family had owned one for years and it has not needed repair or worn out.  The kids are on the thing all the time!  The neat thing about it is that you can even put the elderly and people that can't do exercise on it and they will get the benefits. 

http://www.needak-rebounders.com/

"Rebounding Benefits the Body in 30 Healthful ways

Rebounding is an exercise that can reduce your body fat; firms your legs, thighs, abdomen, arms, and hips; increases your agility; improves your sense of balance; strengthens your muscles over all; provides an aerobic effect for your heart; rejuvenates your body when it's tired, and generally puts you in a state of health and fitness.

You can easily perform this exercise in your living room, your office, and your yard. The traveler may wish to carry a folding rebounder for use in a hotel room. It's the most convenient, metabolically effective form of exercise around.  More details on this can be found in the article written by Dr. Morton Walker in the above link."