Ab Circle Pro?

[turtleschell]

I find you have to do so many sets of crunches to have good results. I get so bored of it.
What I liked about the ab pro was the intensity of the workout, making it harder but shorter amount of time for the set.

[Phteven]

There are so many types of crunches. If you need to do lots of them try something else or use a weight plate.

Try this workout. YouTube - Abdominal Exercises for Boxers (part one)
You'll find something that burns.

[*Beema*]

I wouldn't buy any of these gimicky machines, I could by a medicine ball and do some crunches, you'll feel "the burn"