In auto racing, the cage is normally tight in most cars, and getting in and out of the car is tough enough when nothing goes wrong. In an accident, the Hans may save your neck, but it's almost impossible to get out of the car fast wearing a Hans.
The NecksGen Rev makes the Hans look like ancient technology.
This is so much lighter and easier, and gets out of the way of your chest belts. You can disconnect from it in a second, and your helmet is free, or climb out with it on.
It's so small, you can get out of the cage with little or no distraction due to it being attached to your helmet. The same can not be said for the Hans in most cases i have seen.
If your looking for the next level of safety, this is it!