I use Siri all the time. It's gotten so that I'm often too lazy to tap or type. I use it for reminders, for alarms, for searches, for reservations, and for a lot more. If I have an idea and I'm driving and don't want to forget it, I'll just say "Hey, Siri", dictate a note, and touch it up later as needed. And in my experience, John Gruber is spot on.
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