I've been playing around with the idea of the no-peep....it just looks like it would clog your window.
I have used the hindsight...for about 2 days. Its a great idea, but the pins and apeture are too big. The pins(4) glow as well and take the eye away from the target and the front pin. I like the ideas, but havn't found one I'd trade my peep for yet.

Trushot }}------>