On March 18th, PD Na Young Suk of KBS 2TV's "1 Night 2 Days" guested on "Yoo Hee Yeol's Radio Heaven" and praised "Infinity Challenge" as an amazing variety program. When asked by DJ Yoo Hee Yeol to compare "1 Night 2 Days" to "Infinity Challenge", PD Na replied, "The two programs both have different colors so I can't really compare them, but I do think that 'Infinity Challenge' itself is quite amazing." He continued, "The ideas and the directing make it a really modern program. In comparison, '1 Night 2 Days' is a bit unsophisticated in that aspect. '1 Night 2 Days' has a set format that we follow, but 'Infinity Challenge' doesn't. As a fellow PD, I know how hard it is to come up with so many ideas for such a long period of time. I can't help but feel amazed." Source: Star News via Nate