Worthless if you're paying with credit or debit. I just went on a trip where I had to fill up 6 times, and GasBuddy blatantly gave me the wrong prices 3 times. I have the "Credit and debit only" filter applied, where they promise to ONLY show credit and debit prices, and not cash prices. But they randomly mix cash prices in with them, both on the map and the list, the only way to tell if it's a cash price is to click "report prices" and see which category their advertised price is actually in.