I'm prone to forgetting things or misplacing them - my phone, my kindle, my shoes - so these little gadgets fascinate me:Log In I already have a tagg tracker on the dog that can locate him with an app on my cell phone. Now it looks like I can track my car keys or my wallet or my cell phone with bluetooth within 100 feet. Of course, if I need my cell phone to find the objects and the missing thing is my cell phone, that's not very helpful, is it? Has anyone used something like this? Was it worth it? Would you use it if you haven't?