I've gone ahead and gave a thumbs up on all the posts that express so well the kinds of experience I've had with it. I find I forget to use it because it's not implemented across the other Apple devices I use, namely IPad mini and my older MacBook Pro. And then not all apps make use of it. And half the time when I try it, it doesn't do anything. I don't find it applied or implemented consistently enough to be intuitive yet. I'm glad it exists but I think it needs more time to become indispensable to me.