Same design as NAP's Spitfires and they have a loyal following among crossbow enthusiasts. I have shot the Spitfires and they were great in my bows. I don't forsee any problems with the Shockwaves.
I have a pack of Shockwaves from a few years ago so I tried them on my crossbow and the accuracy was the same as a field tip just like the broadhead's box said they'd be. And supposedly Wal-Mart sells them for $15.00 a pack.