It is only BS when implemented poorly, which is how almost all the knives with them I have seem have been. When implemented properly (cullens not just on the edge, but on the entire surface of the knife) then it actually works.IMHO, this is a fine example of theory that doesn't pan out in practice. I do not find that the hollows t make cutting noticeable easier, nor do they help to separate the slices. IOW, it's BS.