In Periodization Training for Sports, Bompa calls this horizontal vs. vertical training. Vertical would be what chinpiece is suggesting -- complete all 5 sets of bench before moving on. Horizontal is the opposite. Bompa recommends horizontal and points to some other people who agree. I believe Bill Starr set it up this way too, b/c he was running a lot of guys through the program and you can only have so many benches. LoL The thinking is, you're really doing strength training, and you want long rests anyway. Rotating through the exercises gives you more rest. Personally, I like it that way too. There's a fancy scientific phrase for it, but I don't know what it's called, but it's something about your nervous system handling the task better if you switch to back and forth between tasks.