I use it in the car. Great for navigation... "Take me to xxx address"
I use Siri daily.
It's extremely helpful with alarms, reminders, and pretty much for anything while driving; make calls, take down notes, or simply having it read an article.
I've found if I keep the notation somewhat short - one to two sentences at a time, it rarely gives me problems.
I almost never use it, and lately the google app on iPhone has a voice option which seems to work brilliantly for anything that doesn't require integrating with the iOS.
Very true...and something Apple should be ashamed of.
I've found Google Search to work better, faster, be more accurate, have a better understanding of plain English, and sound far more 'human' than Siri.
https://itunes.apple.com/us/app/google-search/id284815942?mt=8
I have used Siri every morning since I got my iPad Mini to check the weather, make notes, reminders, timers, alarms, and to write messages for me.
I wish there was a way for you to say "Siri" and the app would pop up.