Lululemon Go with the Flow Bag

Can anyone give me a good reason to buy this bag? I have been lusting after it and saw it in the store and love it. BUT, and there is always a but, I have a Lululemon bag that I do love and is in perfect condition. My bag is a little smaller than the sand to savasana duffel and is old enough to have zillions of pockets and cute sayings inside. Honestly, there is nothing wrong with it, except that I have been carrying it for probably 7 years? Yup, that was back when Lululemon made fun, quality items that lasted forever. Help!