I just did this giant set routine for chest. I dont go to the gym, i train in my power cage, so i can only do barbell press, started off with incline, then horizontal and as last decline. Did 65% less weight then normal, didnt count the reps, i close my eyes and focus on the lift, pretending that my chest is moving the weight to egt the total contraction. I kept my rest between sets at 6 seconds. I got hell of a pump and had some great tension. I noticed after 70 reps on one excersize, there is no point of continue because you lose the tension on the chest and shoulders kick in. When i changed the excersize, the muscle was surprised and the tension was back in full charge. I think that you can get a better mind/muscle connection using these giant-sets.