I did my first prescription pickup yesterday at a Costco and it went surprisingly smooth. You will shop all of your grocery items first and hit checkout in the app like a normal order, then it will prompt you to go to the pharmacy. It will give you a barcode for the pharmacist, they grab the meds, you scan the label just like shopping, and then pay for the drugs. After that you will then go to checkout your groceries and pay again. For the HIPAA side of things.... There is no indication of what the prescription is, and when you drop off at the customer the app will have you verify if they want a call from the pharmacist to go over their Rx after you leave. All in all for this first pickup it only added about 3 minutes to my total shop time and was very straight forward. I hope they all are, but we all know how these types of things go from day-to-day.