While a bit pricey as compared to the more standard ab wheel, the support that this gives your shoulders and back allows you to push your core much further. I still use the wheel primarily for a single motion, as I find the oblique motions to require support from other muscles that tend to fatigue before the obliques have reached their limit. For me, the knee pulls require balance that also makes the movement irrelevant with this piece of equipement. That said, there's nothing better for the ...