All my recurves and a few longbows have a simple Bear weatherest on them. I trim the underside to get them a bit closer to the shelf, and put moleskin on them. They have never come off in all my hunting days afield. Elk hunting, deer hunting, rain, snow, it doesn't matter.In fact, they are a bitch to get off when I want to.
I get better flight, my bows are easier to tune, the arrow does not fall off the shelf in a tree stand, and in general, they just work better for me. I have a tendency to roll the arrow off the shelf with my arthritic fingers, it solves that too. (FOR ME)