I use GoodRx for my mother's prescriptions and find a great savings. I printed the coupons the first two times and then used my phone. They sent a card in the mail that I can just take to the store now to get the discount. So far, so good. I haven't tried to switch pharmacies with any of the scripts, because the difference when I check online is only about $1 and then I consider the cost of the gas to get to the other pharmacy. We are happy with the savings.