Been using this for over a year...
I have been using this for some time now, since the beta days.
We use it here at work to convert our 5D MKII h264 files to ProRes 422. You can see a difference for sure. Also, I see a better image coming from this than what Final Cut Pro X does with its own conversions.
I highly reccomend the free download, and I would say if you have a need for converting multiple files at once, the 50 dollar purchase price is incredible!.
ThreeDeeAnim8r about 5DtoRGB Lite