It is simply amazing. John Henson, who I loved on Talk Soup back in the day, offers excellent commentary—lapsing into puns facilely but without MXC's innuendo-laced vulgarity. The obstacles are outstanding and punishing, which makes for great TV. And the final challenge is definitely an homage to Ninja Warrior, though less strenuous to be sure.
My Tuesdays evenings are now blocked out. (I Survived a Japanese Game Show was passable, but decidedly a little more focused on the personalities involved than the ludicrous challenges. It's a lot more Big Brother than MXC.)