when this product first come out ... it be the laughing stock of the world . nobody take it seriously and the motion that you have to make to exercise with this weight make for great joke ! however , I recently read in the newspaper that this weight really do work . 2 trainer give they professional opinion -lrb- 1 male and 1 female -rrb- and they say the result you get be amazing . it work the muscle in a way that no other weight can . I decide to purchase it and cross my finger . I must say ... my husband and I reach for this weight at every bored moment we get . so easy to do during commercial while watch tv after the kid be in bed . a hour show have about 20 minute of commercial and use this weight for those 20 minute -lrb- stop while the show be on -rrb- really get you a great work out without overwhelming you .