So I've had the watch now for about eight hours and I can barely feel the taptic engine for new notifications. I'm finding that I missing about 9/10 notifications coming to the watch because I just can't feel it tapping. I have the alert haptics turned up and still it's hardly detectable. Even when I send myself test notifications while sitting alone in a quiet room, and I'm expecting the tap, I can barely sense it. I'm coming from a Pebble and I never missed a vibration on that, so I know my wrist works. This leads me to think it's one of two things. Either the taptic engine on my watch is bad, just like on John Gruber's first test unit. Or the taptic engine just isn't that good.