James Cooperwrote a review of CamelBak Delaney Race Lumbar Hydration Pack on August 26, 2012
This pack has been my hydration buddy on some long runs, and holds enough liquid to keep me in the game for 2+ hours. It's comfortable to wear, but you do have to cinch it down a bit to keep it from flopping around. I've found the bottles easy to access while jogging, and the accesssory pocket is just big enough to hold your smart phone as it records the trip. The mesh pocket does a nice job of holding the smaller bottle in place, and after multiple uses, I have had no issues with the bottle trying to escape. Highly recommended.