I have used GoodRx a number of times. It may not be convenient but it has saved me money. Only once at a Meijer did they have an issue with using the card. Just yesterday we got a prescription that was $122 with our insurance (have not met the deductible) for about $17. It pays to ask.
If you ever have issues using a GoodRx coupon, just let us know and we can help. Pharmacies are usually contractually obligated to accept GoodRx coupons. Email help@goodrx.com. Thanks.