I've been using a Now & Zen timepiece for about 5 years now. It is far more pleasant to wake up to a gentle gong than electric buzzers that shock you awake. You can adjust the strike force to control for loudness. I keep it set fairly soft. When I first got it, it would take a several gongs before it gradually woke me. Still no need for snooze though. These days I usually become aware of it on the first or second gong.
