I posted about this topic before but I have a new idea for a solution. The vibration is definitely too weak on the Steel HR Sport and I find I often miss notifications, however, I realize that I never miss an alarm or telephone call. I realized that it is because the length of the vibration for those two notifications is different, it is longer (and repetitive). I think if Withings is unable to make the actual vibrations "stronger" on the watch, maybe they could make the notification vibration just a little bit "longer". So when I receive and email notification or an app notification, instead of the current quick burst vibration, maybe the watch could vibrate for a full second or do multiple vibrations. Just an idea, because missing emails etc is definitely getting frustrating.