First off are they worth the money? At first i was floored by the pricetill i saw the warrenty on their website. And is the warrenty seriously no questions asked? Has anyone used or had to use it?

I'm looking for a midsized pack. I don't know if I want the Stealth RT, 2200 or the new Hypervent (kinda funky looking). What the heck is the round thing on the back of the hypervent?????? And i'm not sure if i'd like the closure method on the Stealth, but the 2200 may be more than i need.

Any suggestions or experiance with any of them????

Thanks guys!