I don't have any experience with it, but Lowe's has 15.4 lb bags of Royal Oak Briquettes for $4. Seemed like a good price and I'll probably pick some up to try. I was hoping for a Stubb's sale, but no luck.
https://www.lowes.com/pd/Royal-Oak-15-4-lb-Charcoal-Briquettes/1000175405
https://www.lowes.com/pd/Royal-Oak-15-4-lb-Charcoal-Briquettes/1000175405