From what I've seen, the quality is great. The lens is a little wide, but it's better than not being wide enough considering what you'll be using it for. I've never seen the ones that AussieRob mentioned, but they are certainly worth looking into as well if they are in the same price range.
I don't own one, but I do work in the video biz...just my .02.
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Powerfreak is the only one who actually understood anything.