I havent tried it but I do have one concern. I think my dad would think it was a watch and get mad at it because it doesnt work. He would probably throw it across the room.
He might get even madder when he can't get it off. You can get a version that takes 2 hands to remove, so someone can't get it off by themselves. I do wish they had a more feminine looking version for my mom. At least in a different color.