Does anybody have any experience with these or any of the other "premium" coolers? I've been thinking about pulling the trigger on one for the last two years but the price, combined with not being bowled over when I look at them in a store has kept me from making the jump. I guess what I'm asking is what justifies the $400- $600 price compared to an Igloo, etc? It would mostly be used for extended , 3-7 day fishing trips, some car camping trips to remote locations, stuff like that.