Narratives are a huge turn off for me. They always just feel like marketing gimmicks, and some my understanding and interest in a product. I'm perfectly capable of seeing a list of features, and imagining how well they apply to my situation. So, if you use a story, you will lose customers like me (n=1). That being said, I love the idea of Polar, and I'm going to be researching more about it.
Yes, I get very suspicious of them as well. But in this case, the site is heavier on the "what" than on the "why". A little more "why" would be welcome.
