I've had many hydration systems over the years but nothing compares. The most noticable deference is the fit. Every other pack I've had seems to bounce around no matter how tight I tried to make the strap. Other brands use a back pack style of straps with a center buckle around the chest connecting the two straps keeping them from sliding off your shoulders. The leatt uses a much different (much better) strapping system that keeps the pack tight to your body preventing any unwanted movement of the pack while riding. The Hands-Free system also sets it apart from the competition.