Well, probably nobody wants to take the blame for a crashed plane... Or nobody has ever used one.
But what I can tell you, is that a Redundant ESC is a combination of two ESC's, if one shuts down, the other will take over. Also, if your plane is worth a lot, you might not want to use HK stuff (which isn't bad, but just unreliable) and get some top-of-the-line stuff instead.
Sorry if I can't help...