Hi, I have a similar issue: the reminders are not persistent and intrusive enough. My phone may often bee a room away. When it rings, I'll hear, for sure, and most major Calendar/sms/email reminders too, but, the Google Now reminders are sort of "humble", "quiet", very much gentle and in the background. Also, they are not persistent. They will go off, and, if I'm not near the phone, they'll simply go away after a while. This makes it very unreliable, while I believe Google Now could be an amazing tool! Any way to make the reminders keep nagging with noise until you actually click "quiet" or "postpone"?