I have to agree that the Omni - X is not a snake oil antenna. I have had it up over two years now, side by side with a D3000 Diamond Discone and the Omni - X has just as good and in some cases on the higher bands like 700-800, better reception. For the 150 and 450 bands they are very close to each other and looking at the reception numbers in Proscan, couldn't see any difference. If u really look at the design, they are basically vertical dipoles for the 150, 450 and 800 bands. Its small, lightweight, and is not hard to conceal this antenna if need be.
Mike