I've been using Kingsford since I started cooking. My buddy talked Royal Oak enough for me to buy a couple bags.
I don't like it at all. It flares up immediately after I take the lid off my UDS. It didn't hold a consistent temp. And, it ran out after 12 hours at 250. I've held 250 for 18 hours with Kingsford.
I'm going back to Kingsford
Shut Your Mouth BBQ
COS and a UDS