Was always a fat cup up kinda guy, but have tried the last couple down & I do believe that I like it more. I get a better bark on the fatless side when I do fat cap down & the brisket is still juicy, I think that the fat on the bottom actually help retain the melting fat & juices in the meat by holding it in the meat instead of letting it drip out. I also trim the fat to a 1/4 to an 1/8 of an inch.