-- Last Updated: Jan-07-13 6:03 PM EST --
No, I am a fully unbiased observer - I have neither sail, nor have I ever kayak sailed. Your comment struck me as a little disingenuous, particularly when I saw your video linked by Flat Earth, and the extensive reviews of the product on your blog. I really dislike baseless sniping on discussion forums - pretending that a coy remark about copying does not discredit a company is not really logical.
I read the thread and checked out the Falcon sail and like the looks of it. Based on your comment, I checked out Flat Earth and was not as impressed. This is based on how the rigs are engineered (I am a mechanical engineer).
I have no way to judge their relative performance, but it sounds like people really like the Flat Earth, including you. People also appear to like the Falcon sail. Maybe you should try the Falcon, compare the two, and see what's up.