the video do look a little funny , but I decide to try it anyway . pro : 1 . it give a quick intense workout in 6 minute . it be very tiring . on my first try , I could not complete the 6 minute because my muscle give in . I be able to complete the 6 minute after 1 week of use it . so I know I be get stronger . 2 . it be a space saver . it do not use up the space as many dumbbell . you can just kick it under the bed . 3 . the price point be very good . very affordable . 4 . many possible exercise so you body do not get too accustomed to a routine . con : 1 . it do not directly hit my ab . it do it indirectly by use you core muscle . Summary : best bang for the buck workout equipment . if you do not mind the suggestive movement , you will get a quick great workout .