To be brutally honest it leaves me a little bit cold. I'd like to see a wider or closer detail. For some reason I want to know what's on the right because the rushing water is more furious there and it draws your eye right and you're thinking "what's there?".
Also, is it just me, but would it have worked better horizontally? Good exposure though, it's very difficult to get water right with all the crazy light from the rushing.
Rob
Rob