Personally, like others here I am sure, picked up one of the Sterling Sharpeners for my EDC. I was recently on the Knife Forums, and read a slightly disturbing review about the sharpener. It made me think twice about it, and I have actually removed it from my EDC since I carry a large Sebenza, and the good folks at CRK don't like them. You can read the review and make your own judgements. As for me I like the compact size of the Sterling, but not if it may tear up my knife. Looking for an alternative. Probably will go with the DMT Diafold. Want the Spyderco, but too big for EDC.

http://www.bladeforums.com/forums/showthread.php?t=290439