O2 Unleashed - Gimmick or helpful tool for the Mountain Hunter??

Here's a new product that caught my eye. What d you guys think? Legit, gimmick or like most products, somewhere in between?

[video=youtube_share;-taQ6DQ5fPg]http://youtu.be/-taQ6DQ5fPg[/video]



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I just can't help but picture this...