Product great, pay schedule :|
I like the product. I would say that one thing you could improve upon is make it easier to navigate purchasing the product. I ended up being on a regularly scheduled refill, and didn't realize it. A shipment arrived, and of course, credit card charged. I get that you want to have reoccurring customers, and we get a discount for doing so. However, make it option to do a pay-as-you go. By offering that, you will get more customers and retain them for years to come. Thank you.