Used this USWE pack on an 80-plus mile gravel ride and it proved to be a life-saver, or at least saved my ride. Once set up and adjusted to fit I almost forgot I was wearing it most of the time. The pack never once moved around or came out of adjustment. I never experienced any points of discomfort, chaffing, pinching, etc., after 11 hours of wearing it over mixed terrain — from perfectly paved roads to technical single track trails and everything in between. The bite valve worked perfectly; and its magnetic clip made moving the drink hose around a care-free task. The removable external pack/pocket easily held a cell phone, various gels and food, as well as a few other small items. I also had room inside the bladder compartment for a few items even with a full water bladder. Opening the bladder itself was a bit confusing at first because of how it seals (thought I was going to damage at first), but once I learned how to “peel” it open, all was well.