NP is a good product, but they are radicaly overselling it. It cures target panic! Give me a break.

No sight accessory should be relied on for form. Form is what you have when you draw the bow with your eyes closed, then open them. If everything is right them, you have good form.

The NP will definetly show you you have hand torque, but you can' t change the hand position until you let down, just twisting your hand straight is worse than useless. The NP is no different than looking at the position of your stabilizer or whatever, and seeing it pointed at your neighbour' s target.

I didn' t see on their site how it cures up/down shooting. Where is that? The basic downhill problem is that people don' t keep their T-form. There are other things, but that is the comon one. To shoot 45degrees downhill, you need to drop to a knee on the inside leg, brace on the downhill leg, and bend from the waist only. No dropping the bow arm. Not sure how the NP helps with that.

By the way, 45 degrees is very steep. In the Mont Blanc range in France, which contains many of Europe' s premier mountain climbs, the average angle of the great faces is 55 degrees. A real 45 is very steep, like being on a slide in the park, so just be sure you aren' t exagerating when you say it since it will impact your holdover.