Fast delivery and no problem with payments during purchase. The effects of the product itself, outstanding, I feel more energized, experience an overall better mood and (unsure about the sleep itself) wake up early and refreshed. I usually take the powder mixed with full-fat Greek yogurt every day, although at varying times. Takes a couple of days for your body to get used to it and I actually felt the benefit after 2 days but I think Bimuno advise 5 days. After trying all sorts of vitamins, supplements, tablets, etc. for various reasons over the years, a prebiotic like this one is definitely going to remain part of the daily routine.