I just snapped my three times used $350 r-series on a class II/III river. It snapped in a hole, I have video of it, I wasn't bracing off the bottom or anything. I know a pro-paddler who uses them cause he has carpal tunnel, he's gone through 9 whitewater ones in a year. To me its a very fragile paddle for the money.
If I had to do it all over again, I would get a lightning (
www.paddles.com). They are a midrange paddle, that can standup to years of abuse.