I'm surprised at how poorly thought-out the UI is, and particularly surprised at how little control I have over it, at least out of the box.
For the moment, there's no way to invert the screen color, no way to view text or call history (even to the point of seeing a notification if you accidentally press the wrong button and dismiss it), not even a battery life indicator that I've been able to find.
Eventually, as developers start getting apps on the Pebble, and as Pebble themselves work on the UI, I have faith it will improve. As the author says, this is what it's like in early adopter land.
One thing the Pebble has convinced me of is that smart watches will be a popular product category in the near future. There's just too much potential, and even my very basic, very early-stage Pebble has already become one of my favorite gadgets.