Each sachet holds more than one use. Tear a small corner rather than the whole top, use what you need and fold it over, and most face samples will do two or three applications. Use them in routine order: cleanse, serum, eye cream, moisturiser, then night cream or face oil in the evening. That way you get a real sense of how the products work together, not just one at a time. Give each product at least three or four days before judging it. One application tells you about texture and scent, not results. Try the hair samples on a wash day together, since the shampoo and conditioner are designed as a pair.