My brother gave me a couple of Tiles a couple of years ago. When I travel, I put one in my camera bag. I've also put them in my panniers. I haven't had to recover a lost or stolen item yet. But I have used them to find my keys and it's kind of cool to look at the app and see my backpack, tablet, and etc... findable
Word is that the Tile network is smaller than the Apple network so theft recovery isn't guaranteed. But it's a cheap plan b for me.