David Pogue on the shortcomings of the Apple Watch:
On the Watch’s weird software layout, as noted earlier, apps aren’t anywhere at all. No matter where you start, you can’t swipe your way to the Home screen.
The only way to find them is to click the Watch’s crown.
OK, we could probably learn that: Clicking the crown is like clicking the Home button. Clicking it always opens the Home screen.
Except that it doesn’t. If you’re in Glances or Notifications, pressing the crown once takes you back to the watch face; a second press opens the Home screen.
Well, we could probably learn that: The first crown-click opens the watch face, and the second crown-click opens the Home screen. Except that’s not always how it works, either.
If you’re in an app, like Mail, the logic is reversed. This time, the first crown-click opens the Home screen, and the second crown-click opens the watch face!
How is anyone supposed to learn that?
This was exactly my problem when I first tried using the Apple Watch. I was turned off because nothing made any sense; the mental model was too complicated and inconsistent.