(Kind of loud. But be sure not to miss his awesome reaction at 4m20s.)
I have the original devkit, and it's amazing. You can even interface it with Google Street View. There's nothing like typing in "Eiffel Tower," tilting your head back, and staring up in awe.
In fact, I'd say no one here has experienced Street View until you've seen it with an Occulus. It simply cannot be described how incredible it is to look around with your head instead of dragging your mouse!
EDIT: Okay, if you're unhappy with that particular video, then this one might be more to your liking: http://www.youtube.com/watch?v=fl7fz__6B-4#t=15m30s
EDIT2: Wow, that Dreadhalls game is terrifying. You actually don't even need an Oculus to get the full effect, just headphones. https://developer.oculusvr.com/forums/viewtopic.php?f=51&t=3... (Windows / Mac)