when i get a waft of the essential oil during office hours, i get reminded that i need to take deep breaths and chill. i had to remove one star though because there was no option to select the wax cord. i was sent the metal chain and it looks awful. so i had to buy a different cord. i've been using the Zen oil only for now, cause i dont want to keep replacing the sponge inside. i dont want to put different oils on one sponge too (might mess up the scent). i love this. the size of the locket is just right. and even though i set the length of the cord really long (below bust line), i still get the scent of the oil every so often and it immediately soothes me.