It's meant to tie in to both the Sheikah items in the games (Mask/Lens of Truth, and the Stone of Agony in Ocarina of time) and the "chi/ki sense" of fictional martial artists. It's not intended to be as strong as Spider Sense, as that borders on precognition a lot of times. This would be like noticing something out of the corner of your eye as you walk on a crowded sidewalk. He might be able to differentiate what he's feeling ("Is this magic, or bloodlust?") but he can't know for certain what it is ahead of time, and has to consciously react to it. Something like an enemy coming down on top of him with weapon at the ready might trigger a strong enough response that he'd know "someone is trying to attack me from this direction" but he still has to turn around and react. He doesn't know if they have a sword or an axe, and doesn't know if they're too heavy to stop or too fast to get away from.

If you're still not cool with it I can downplay it some more.