I've given handhelds many chances, and always come to the same conclusion: I hate them. For shorter runs I can tolerate the one-bottle waist pack but for everything long it's one of the Nathan packs. I tried one of the Inov8 packs a couple of years ago and it didn't hold a candle to the Nathan. And the one time I tried running with a Camelback brand pack I about tossed the thing in the river. I guess Columbia is now making running packs, but I haven't seen one yet.