Very advanced form of rest-pause. I see the theory behind it, as Dan is very good at piecing stuff together from various sources of research. It does not, in my opinion, increase overall time-under-load (TUL), so the then there must be some other mechanisms at work by limiting rest periods to mere seconds, limiting lactic acid production, and doing only one set (in a sense). The key factor that I saw emerge from reading his very technical description is this method aims to limit fatigue which allows you to complete rep after rep with short pauses between reps. Limiting fatigue has a positive impact on the cascade of events that occur within the muscle cells that cause protein synthesis. So, is this method of training better than doing 5 sets of 5 with 80% 1RM? I suppose the proof is in trying it, because there is no way to give a definitive answer based on the research. The drawbacks of course is that re-racking the bar after every rep of squats, bench presses, shoulder presses, etc... can be awkward and sometimes dangerous. There are neural pathways at work, even when you unrack and rack the weight, and repeatedly doing so during a compound exercise will lead to fatigue in and of itself.