Siri is mostly useless. It works about half the time for me. When I ask it to do a task like create a timer, it works, but asking it questions is almost useless. One time I asked "What is a picometer?" and it gave an answer from Wikipedia, but then I immediately asked "What is a femtometer?" and it said it couldn't answer it on the iPhone. My wife gets amused whenever I use Siri because half the time I'll start swearing in frustration at how stupid it is, and yet like Charlie Brown and Lucy, I keep trying to kick that football.