It's very good for delivering information from the smartphone without having to reach in your pocket. Any notification has its text delivered to the watch. On the other hand I haven't found it to be terribly useful at taking input. Awkward buttons with awkward placement on the wrist, it's just easier to pull out the touchscreen. Still, just as a satellite screen it's really nice to have. Sure, I could technically live without it just as I could technically live without a smartphone, but I have chosen to wear mine every day for the last year or so.