Ossage,

Since I've put many hundreds of shots through my bow with the NP attached, I'll take a stab at your last question.

At first, when the NP was new to me, and I saw that the bubble was off, it took thought and effort on my part to figure out how to bring it back in proper alignment. After a lot of practice, it became a subconscious adjustment. If you bring your bow to your eye and the sight pin isn't centered in your string peep, you don't have to think about how to get it centered. You do it naturally. Same with the NP after the adjustments become ingrained in your mind. It's usually, just a fraction of millimeter adjustment on your anchor or a slightly different pressure where the grip hits. My experience is that it's easy to do and very helpful. I shoot better with it than a large string peep and I wouldn't even consider a small peep for hunting. I wouldn't care how bright the lighting. Small peeps block your view and make it difficult to pinpoint your target area.

The other thing is, that it's not the kind of product you regret buying. It's small, unobtrusive, light weight and not something you worry about having on your bow if you decide not to use it.