Something about it bothers me.
When you visit their website and look at the ingredients for something like the Sleep one, it says things like this for melatonin:
"is an ingredient universally found in plants and foods, including corn, rice, wheat, barley, oats, wine and beer.1 melatonin is also naturally produced in the body to help regulate the sleep cycle."
It seems kind of disingenuous to compare a pure melatonin additive to its minuscule presence in foods and drinks. Taking a Neuro Drink is not the same as eating food but they are attempting to draw a correlation there.
Personally I would not buy these, mostly because they are gimmicky and too generalized. Making one concoction for "sleep" is not going to address all the reasons why millions of people have insomnia. If you're ignoring diet, not exercising, are doing drugs a lot, then the marketing of this might delude you into thinking your sleep will improve if you just buy their drink.