Check out this list of 17 Fitness Fads Flopped from Greatist.com.
I definitely have my favorite programs and products: Insanity Max30, PiYo, Shakeology and all things Nike.
The bottom line is this. The only way to achieve lasting results is good old fashioned fitness + nutrition. There is no magic bullet, special sauce or secret recipe. Have some fun with these goofy gadgets....and then keep it simple.
Move. Hydrate. Eat. Sleep. Laugh. Love. Live.