I rate the products and the customer service from QNL a solid five stars. The only reason I am rating the company four stars at this time is because they recently changed the way that quantity discounts are calculated. Specifically, in order to routinely get the best quantity discount, customers now need to order nine bottles of a product. Therefore, it behooves customers to save money by trying to schedule their buying around holiday sales and the annual July sale - and we remain extremely grateful for these product sales-but it is now more of a challenge for the customers to get the best value for their money.