As a person studying nutrition with the goal of being a registered dietitian, I find NUUN to be a great hydration tool because it's low in sugar and doesn't sit heavy in your stomach. It works well on hot summer days like what we are currently experiencing. I really like that it's not carbonated and can be mindfully and easily balanced into a healthy diet because of the low calorie and sugar. I do wish the flavor was a bit stronger, but that isn't much of a concern. Again, my favorite part is that it sits so nicely in my stomach because it isn't loaded with sugar. That really helps me during my long runs.