PERFECT PROTECTION
COUNTER-PRODUCTIVE
When one carries a camera like this young lady in Tokyo, it ceases being a preventative measure against dropping the camera and turns into an insidious device waiting for a chance to snag on something and forcefully snatch the camera out of your hand and send it crashing to the pavement.
What I use instead is a simple wrist loop that attaches to the tripod mount on the bottom of the camera. Simple, cheap, reliable, flexible, fits in my pocket when not in use, and is easily portable from camera to camera.