Csar,
People I trust use Kellogg’s, and it appears on lists which I consider trustworthy. Nevertheless, one can’t extrapolate that the hechsher is reliable, because it might be okay despite, not because of, the hechsher.
I actually have no specific knowledge about that hechsher, I don’t mean to imply that it’s not reliable, just that the general acceptance of Kellogg’s shouldn’t be a hechsher on the KVH.