Aarn Packs

I need a new pack (Hip belt on the old one is stuffed, and it was never a brilliant pack anyway), so Im currently weighing up my options. Im intrigued by the concept of the aarn range of packs with the front pockets and certianly the science seems sound, and I can see the benefit in gear accessibility. I first heard of them a year or so ago and thought they seemed pretty gimmicky, but now I'm beginning to think otherwise. All the reviews I can find seem overwhelmingly positive. Does anyone have experience with these and would you reccomend them or not? Also, Any negative points in particular would be of interest to me. Cheers