"back inda day" we typically sold/setup bows with EITHER-OR a peep or a kisser button but NOT BOTH! The more crap on your string the more you're slowing it down plus increasing shock, noise and wear. Learn to feel the release on your jaw/face or where your hand touches behind your cheek/jaw, on your neck etc... that will quickly become the same thing that you're getting from the kisser.

I'll ALWAYS recommend a peep (I prefer a large, non tube like a "surz a peep" but that's up to the individual) as they not only aid in repeated/consistent anchors but they serve the same purpose as a rear sight on a rifle. You "point" a shotgun and "aim" a rifle, you likewise AIM a bow!