Really excellent! Amazing flavour. I don't think we followed the directions to the letter, but all turned out fine in the end. We made the rub as directed and coated our rib racks in it about 2 hrs prior to cooking (in the recipe the rub is only used at the end). We also weren't sure about when to use the mop sauce, so we brushed it on about every 10 minutes or so throughout cooking on our gas grill. (Yes, charcoal probably would be even better.) Followed the directions for timing as well as the finishing steps to get a nice crust and it worked great. We were afraid the rub was going to be too spicy, but it was perfect. We will be making these many, many times!