I fortunately received a Defiant Edge early through a facebook contest and just drilled it up. Can't say a whole lot because I only bowled a few games with it so far but it definitely is a strong rolling ball. In comparison to a Hy-Road with the same layout I had to move 5 left with my feet and 3 left with my target at the arrows to get to the pocket with the Defiant Edge on a slightly tweaked house shot (one of the Kegel Challenge Series Patterns).

This ball really reminds me of the Cell Pearl in shape, just stronger overall. I'll add pictures later and if I get out to practice again this week i'll shoot some video.

i also saw a staffer throwing one on beaten path.  looked gtreat.  mine is being drilled hopefuly have it next week for u.s. open pattern.