I have one, it was a pressie. I haven'tused it for running. But have used it for a day of mountain biking and rambling round the countryside. I was happy with the performance of it when I was mountain biking. It didn't bounce about,it has a chest strap and a waist strap to hold it tight to your back. The main pouch held a waterproof, a warm top and some snacks. The front pouch has little compartments for map, wallet etc and key clip. Only small point is that it is not waterproof, still requires a liner.
But great to have water on tap and not have to carry a water bottle.
