Are Bosu Ball Exercises Really Worth It?

Hundreds of personal trainers are using the Bosu Ball for their clients but is it even safe or effective? There has been a huge push among trainers in the fitness industry to implement a wide array of exercises with the device that it is astonishing. Increasing balance and core strength has become so mainstream that the use of the device has become the norm. With the exception of rehab, could you possibly be wasting your time and energy with Bosu Ball exercises?