I'm a longtime Camelbak user. The biggest thing for me is the insulating factor. Even the very best Polar bottles do NOT compare to Camelbaks for keeping water cool and drinkable. I agree that Camelbaks are not "cool" for road riding style points, but nothing compares for convenience and ease. Long story short;you will drink more and stay hydrated better because the water is convenient and cool. Screw the style points and 70 oz. is not too much during the hot days of summer. I've drained mine several times.

Mark