Maybe this is common knowldge, but one thing I learned listening to John Gruber's most recent podcast was that you can't edit text that you dictate to Siri for things like text messages. So if she gets one word wrong, you will have to try the whole thing again or just live with the mistake. He said he thought this was why you can't respond to emails on the watch--emails tend to be longer than texts and given the current situation it would be too frustrating. Just thought it was interesting. I wonder if this is one of those things that they will improve in future revisions.