Kingsford Comp from Costco has been my preferred charcoal in the WSM. This year my local Costco changed to Kingsford Pro, and though it's similar, I don't think it's identical. I haven't used the Pro enough to tell if I like it as much, but it's certainly good enough. Like a lot of us, I stocked up on Weber briquettes from Target, so I'm hoping those work well in the WSM for the foreseeable future.