Star Wonderbug - Good for whitewater?

I am wondering if the Star Wonderbug is more a fishing than a whitewater boat. The two we have are Wonderbugs, with one fit for use as a paddle boat. We have mostly used it for fishing. Has anyone used it on higher-level whitewater, mainly the Chattooga, Gauley? Seems like it would be good for high-water on Gauley, acting like a cataraft in a way, but what about technical stuff like Chattooga? Mainly, has anyone found it as or more adventurous as say a smaller-tube boat?

Mark Cemanski