Check out our video and complete review.  3 testers on THS and sport pattern:

http://tamerbowling.com/radical-katana-bowling-ball-review/

Excerpt:
In the end, the Radical Katana looks to be a pretty versatile piece. It has a nice downlane motion that isn’t skid/snap but punchy in a way that a lot of bowlers will enjoy. That motion will be accentuated on the typical drier conditions many are facing but at the same time, we found it very nicely usable on the tough stuff as well. Every tester liked what they saw.