Bought for the Ambleside 50k (yesterday), I didn't try it out before the event, just loaded it up and ran. Brilliant pack, front bottle pockets are perfect for flexible 500ml bottles. Small zip pocket good to stash my emergency cash (thankfully not needed). One tiny niggle was the size of the opening on the side pockets, a Pixel 7 in its case would just slide into one, but the other was a touch too small. Am I happy with it, yes. Value for money, yes. Any regrets, none at all. If you want a great running hydration vest/pack and don't have money to burn, buy a Harrier Kinder 10l.