Almost there...
I have a few Tiles & theyve helped me with misplaced things, but....
Unless theres a way for it to somehow run in the background more than it does, its not always helpful because, unlike Find My iPhone, it doesnt have much of a memory. Provided the app was on and you were within Bluetooth range at the time,... it finds the list item. Otherwise its more like a card from the game, Clue,... it helps to narrow down where an item isnt, even if it doesnt actually find it.
Id up my stars if it could work as seamlessly as Find My iPhone... Right now it works more like your mom asking, "Well, where did you last see it?"
Legare about
Tile - Find lost keys & phone