Haven't bought one and probably never will. My fingertips still work fine.
As I think about it, I believe part of the reason is the really crappy way the main seller of these things did his advertising on this site, when he first got them. Instead of posting his product on the Equipment Exchange section, he came over to the info boards, and crapped up this section w/his advertising. but htat's just my wierdness, I guess.
Even though I'm partial to Israeli products (I even married an Israeli "product"[:D]) I think I'll pass on this one.
Oh BTW, the claims that it's used by the Israeli Defence Forces may or may not be true. All I can verify from my friends over there is that NOBODY I know serving in the IDF has even heard of the thing, much less used one. Still, I don't know everybody in the IDF[:D]