Sure, I understand you can't warantee against 'river hazards' such as rocks.  However, there is no denying many new boats are becoming incredibly flimsy, and are touted as 'downriver playboats' but are just as light as their dedicated park-n-plays.  Now personally I feel river runners should be more stout simply due to the fact that said 'hazards' are acutally the norm and not the exception.  Frankly it's scary thinking about getting pinned/painted on a rock and having that 'high performance downriver playboat' wrap around your legs.  For instance, compare an Inazone or GTX to a Booster...