Got to love technology. I am a huge proponent of a solid core workout. I have broken my back more than once and have a deteriorating L4/L5 situation, so it is immensely important, especially at 56yrs old, to have a strong core for my back. Well, enter"CoreFlex 4D". I have only had it a few days and have not had a chance to start the program, but I have tried it out and can tell 'immediately' the incredible isolation this product puts on your core. I think this is the icing on the cake I have been looking for to finally have the complete core upgrade I have been wanting. See you in a month with a before and after pic follow-up. Thanks Fitness Hardware!