Hi,
I have yet to try it, but I heard of it. It seems to be different from those available in Singapore. I have seen those that sell in Singapore, they look more like a normal filter lens. However, for that from Photojojo, it's more like our usual lens cap with a white exchangeable dome in the middle.
You intend to get is it? Not cheap, as it cause about USD50+.
Let me know if you have try one.