Holds bottles very securely. However, if you're using Camelbak Podium bottles, they can be difficult to get in and out of the cages because of their shape. Stick with straight-sided bottles for best results.
I know it's not as fancy as some of the carbon cages out there, but it's still super light and I've never lost a bottle. The price is right too, and if it's good enough for the pros it's good enough for me.