Adding to the chorus...
I started out with separate stuff sacks for tent, bag, pad, clothing, food, and misc -- 6 in all. I remember what a royal pain it was to wrestle some of the stuff into their respective sacks with cold fingers every morning!
I didn't much care for the incremental weights of the 6 stuff sacks, and I could even overlook the time and effort expended each and every day -- if using stuff sack resulted in better pack space usage... But the OPPOSITE was true!! I experimented by dispensing 4 of the 6 stuff sacks (I kept the tent sack as that goes outside my backpack, and one small one to house the various small and loose items) -- and I quickly found out that I could pack a lot more stuff in a lot shorter time!!
So, forget the stuff sacks. Just cram the stuff in and the way the arrange themselves into all the nooks and crannies of your pack -- it will be a lot easier, more efficient space wise, and lighter weight too.