Big improvement over last years model. This year's model has a sliding clamp that allows you to easily fill the bladder while it is still in the pack. Also, the material of the bladder is much easier to clean and doesn't retain the color from your electrolyte replacement fluid. There is a very handy pocket that allows you to stuff a lightweight fleece or rain coat along with additional food that won't fit in the hip belt pockets. So far I haven't had to mess too much with the compression cable because velcro sternum straps fit so well. I know it's expensive but it will last any ultramarathon you run. Happy trails!