I run GetItBack on BIS. While I hope it's never needed, I'd have better chance at getting it back with GetItBack than without.
A few months ago a friend of mine lost his cellphone. As it turns out it dropped out of his pocket and was laying in the street by the curb. A teenager happened to find it. The girl's father called my friend and it was returned. It was that incident that made me realize that for a small investment I'd have a bit more protection in case it's lost.