Well, after three days, I don't know if I can really see a big difference. I think by the time it got here, she was coming off of a teething session anyway, so time will tell. But she asks to wear it first thing every day, and runs around the house saying, "Nek-tiss! Yes! Ny-yit so peetee!" (Translation: Necklace! Yes! Violet so pretty!) So that's good enough for me.