I've been using Nike+ since it was launched 10 years ago, and bought the Nike+ version of the watch when it was released. So, I definitely qualify as a "fan."
However, I personally can't recommend the Nike+ watch to anyone intending to use it primarily for the Nike+ Run Club app. It crashes constantly on my watch, resulting in freezes that require me to restart the watch. I've been working with both Apple and Nike to try to determine the cause. The watch works perfectly is in all other respects. The Apple workout app is rock-solid. it's just the NRC app with which I have trouble.
I'm not alone, either. Read the reviews in the iTunes app store, and filter them to show the "most critical." You'll find dozens of people describing the same issue: the app crashing on the watch and freezing everything up.