Siri understands what I'm saying (I have "Always Show Speech" enabled, so I can see what it thinks I said), but it's what it does with the info that's a problem. In the last few days:
1) I said "remind me that Ronnie will be away when I get to work". It added a reminder that simply said "Ronnie" and didn't set my workplace as a location.
2) I asked Siri to play a song by a band that I frequently listen to. It gave me a cover version of said song by some obscure band. Why isn't the OS smart enough to see that I listen to the band regularly and give me the version of the song that I most likely want to hear.
3) I asked for directions to a business that I was near (a road was closed and I had to re-route - not that familiar with the area so I asked for help), and instead Siri gave me directions to a town that shared the same name as the business. The business shows up in Maps, so why is that not the first choice instead of a town that's seven hours away?
4) On Apple TV, I asked it to "find the movie Maestro on Netflix" and it took me to the preplay screen for the movie "My Octopus Teacher". Not even close!
It's pretty good at setting a timer though.