I used it, and when I did, I broke all of my plateaus. I tried it for the hell of it for that reason. I was stuck on bench, squat, etc. etc. ... and I was running the same program which was mainly 3 heavy sets of 10, with long rest in between, same typical gym rat run. Instead I switched to the 7 sets and lowered the weight down and rested between 30-60 seconds.
When you first start it, and commit, and do it right, you won't make it (7 sets, 30 sec rest), but don't get sad, you'll figure it out. What I did was go back to a weight where I didn't feel like a pansy and did the 5 sets, 10-12 reps, and I went 60 sec rest. Then everyday I slowly brought those times in to 30 seconds....then I brought them back out (like 45 sec) and added the 6th Set, then brought them in again...then pushed the out and brought them out again and added in the 7th Set.
It also takes time to figure out which weight for which exercise is right.
]It's really about maximizing intensity (push as heavy as you can go, while maintaining a ton of volume).
Then once you get accustomed to the new style...go back to your compound exercises, and warm up and try to for best 8 rep max weights. You'll smoke them if you take it seriously.