As we found out when trying the Nike+ watch in September, you're really buying this for the software. You get both Nike's running app out of the box as well as a pair of exclusive watch faces geared towards athletics. The more breathable straps are helpful if you can't stand a sweaty wrist at the end of a workout, but not as essential. You're otherwise going to experience the same performance, GPS and water resistance as a run-of-the-mill Series 2. In short: while it might be the Apple Watch of choice if you rarely go a day without running, it's not so essential for everyone else.