I think the first thing you have to go into any discussion about DNP is expectations & commitment. Its only going to be as good as your diet that you go w/. You may get "results" if you are pounding donuts all day long, but the other side of that is that you are so wiped out and short of breath that you are very limited in your ability to do anything else. From that standpoint, I would argue that if you looked at the sum total - cost & benefit, would it all even out to the same as if you were to stick w/ a good, consistent cutting diet, cardio & your usual training vs a DNP cycle? You sort of have to set aside your life for the duration of the cycle to get these amazing results. I dunno about y'all but when I have an interruption in my schedule, it throws me off. If I have everything optimized and have my burn rate going, I'm off to the races.
Just some thoughts. The morbidly obese are probably the perfect target audience for this stuff, as long as they can have some control of their diet. But if they are already living the enforced sedentary life, they are already in a perfect place to just sit and take it w/o expecting to do anything more. If you're a bodybuilder trying to bulk while keeping bodyfat down - are you actually able to execute quality training sessions on shortness of breath and sweating bullets? If you're trying to cut, can you do any sort of aerobic activity to get to that goal while running this stuff?