I always lose my keys, and it drives me crazy. Its a good thing to have a spare key, but its not great knowing your keys are lost somewhere. I like that it came in a 4 pack, so I can actually find my keys. It has been a lot easier on me to find my keys. If you happen to be a person like I am, and forget everything, then I would suggest this for you. Just need to start attaching these to everything. At least I would be able to find everything that I randomly lose, but have a need for often.