I really cannot imagine a more useless product than this watch. It requires an iPhone and seems to essentially serve as a small, remote interface for your phone. And how do I navigate that small interface? With an even smaller "digital crown." I hate trying to set the time on my watch, and now they expect me to interact with something more complicated using a tiny, rotating nub?
Imagine a typical scenario. You are walking down the street and suddenly need to navigate somewhere. How many minutes are you going to waste playing with that little nub and resizing things on the screen before finally pulling out your phone and just using that.
The only argument for this watch is that it might be helpful for those times when pulling out your phone is just too onerous. I regret that I do not have the type of lifestyle where that is a serious limitation.