Very handy!
I bought these to put tile stickers on my cats' collars. The cats don't mind them. It is pretty difficult to get the tile sticker into the case. I got in in eventually, but I accidentally got the button to not quite line up with the button hole. I was unable to remove it to put it back in straight (I guess this also makes it hard for it to accidentally fall out!). Overall though, it is a good product.
Rating: 4 stars