I am a veterinarian and recommend GoodRx for our clients, especially on long term medications. Have not had any bad reports from clients except for Wal-Mart, and I've used it, too, at Walgreen's. I HAVE heard though that Wal-Mart is not accepting GoodRx coupons for pets. I can't verify this, but generally discourage owners from Wal-Mart for that reason. Perhaps GoodRx can elaborate?
Thanks!