I think this one is good for some physical excercise. Please see my personal review below :

Pros :

• It is recognized as one of the revolutionary technology when it comes to physical fitness
• It does help improve your workouts by using your speed and your reaction times.A good way to perfectly balance yourself too.
• It has many different training modules to select from where it does really improved your yourself.
• Aside from the product it can be integrated to your iOS and Android phones where it can track statistical data on your workouts
• It has been published on many press like Geeky Gadgets, Stuff and many others

Cons :

• They are still on process of Pre-ordering