Fairaher The film makes a home in your brain and the only cure is to see it again.

StyleSk8r At first rather annoying in its heavy emphasis on reenactments, this movie ultimately proves fascinating, simply because the complicated, highly dramatic tale it tells still almost defies belief.

Allison Davies The film never slows down or bores, plunging from one harrowing sequence to the next.

Billy Ollie Through painfully honest and emotional moments, the movie becomes irresistibly relatable

crueltyfreeeating I wouldn't have my daughter watch this documentary. Nikki's consumption of sugared soft drinks, bacon, white bread processed meat sandwiches in some scenes while talking about kids who are fat in other scenes bothered me. Perhaps you can eat what you want when you run. You can. But should you? Her diet is no inspiration. And no one should exercise to the level that Nikki does. There is a whole lot of unhealthy in this documentary including emotional breakdowns that don't help her cause. She needs a whole team to deliver her junk food diet to her as well as water and bandages and etc. while she races. Ladies . . . we can do better. No amount of cool music and slow motion running shots can save this documentary from disaster.