Yeah, I looked at that when they first came out, I like the idea of nothing on the string to move, block light, etc... But I don't think I like the way you have to aim these types of sights. I think like anything, it just takes some getting used to.
So for now I will stick with the peep, but I do like the basic design of this sight. I have seen some that the rear sight, instead of crosshairs is a v notch just the rear sight of aniron sightedrifle only with two little red fiber optic dots to help center the front pin.
Here is the link:
http://www.peepeliminator.com/