Most of the Mac blogs I read are down on Siri this week.
Weirdly I’ve gotten used to things that mostly work. I do “remind me” 5-10 times a day, ask the time, date, temperature, find things in settings, do math “Graph x^2+5x+3”, delete all my alarms, etc.
Siri works best for phone control and phone actions. I’m frustrated when I use my Android phone because Google Now is lousy at that stuff (but great at answering natural language questions about the world).
Siri is lousy at most of the things Apple advertises though, and the periodic zone-outs are truly irritating.