TKO the abc to ABS

This is an ABS tool I used a lot in Israel and I loved it.
So I have it here, we will see how I like it now.
What I remember liking is that you really work your abs w/ out straining your neck that is if you are not cheating. Cheating in doing ABS can be without paying attention and relying on arms back and legs to do the work.
Most people curl, actually from all I know form Yoga and Gym training , curling your body isn't the most friendly to your body.
I wonder if TKO will allow ab work allowing the body staying in neutral position.