This doc is beautifully shot and well put together. It's full of gorgeous scenery from all over the world. The culture they experience is interesting and real, and the stunts they do are indeed death-defying.
BUT, these guys are seriously the most self-entitled whiny babies I've ever seen in a documentary. It starts out with a really impressive run up a major river in British Columbia, but quickly degenerates when one of the riders starts complaining that Nepal "sucks" because the dirt is different. Another literally throws a temper tantrum and trashes his bike because he can't do a trick among the gorgeous red rock mesas of Utah. In China, one of them hurts himself and has to go see a doctor for what amounts to a few scratches and getting the wind knocked out of him, taking time away from locals who likely have real problems.
These guys are sponsored to ride all over the world, get to see some of the most beautiful and untouched sights any human has ever seen, go to places most people will never see in their lifetimes all expenses paid, and ride their bikes down incredible landscapes, yet none of them appreciate where they are. All they care about is looking good and doing tricks, and whenever the slightest thing goes wrong they annoyingly bring down the upbeat feel of the doc by whining about it like it's the end of the world. It ruins an otherwise impressive documentary.
Well made by the filmmakers, but full of people I'd want to punch if I ever met them.