Saw a demo of this where the dummy fell off the front of a bike and the dummy fell right on its face. The helmet doesn't seem to protect the dummy's forehead, not getting all the way in front of it.
In most crashes, the forehead and top front of the head strike first. Experts recommend buying a helmet that sits low on the forehead, about one finger-width above the brow.
I can personally attest that even those won't protect your face in certain circumstances. No helmet is perfect.
(here are pics of me. WARNING: blood http://imgur.com/a/UgGTI )
If there's data to prove it's just as safe as regular helmets (which right now aren't tested very well either, if memory serves me correctly the only test required is to drop a weight on the helmet at height) then I might be less critical, but I still think the forehead protection looks a little shoddy on the surface.
I took one to the hand once, I can't imagine taking one to the face or a full on crash.
You don't wear a helmet on your nose, and nose gets a third hole.