Hunter Huffmanwrote a review of K-Edge Chain Catcher - Braze-on on November 1, 2013
Familiarity: I've put it through the wringer
The K-Edge Chain Catcher maybe be the best little component you can buy for your bike. It saves you from chipping your frame that you have been saving up for years. As well as from dropping your chain as your about to win your next race.
If you don't want to drop your chain ever again I suggest going with the K-Edge chain catcher.