This all boils down to - How do you want to play the game? There are many ways to achieve an end.
If you wish to blast, dose it all at once. However if you are wanting to prolong GH usage, as results tend to fade over many months, then divide it up. There are several methods that have been discussed previously on exactly how to maintain continued results almost indefinitely.
The PRO on blasting is you are overwhelming the body via pushing saturation limits. This in itself is a good thing, at least for the time being.
The CON to blasting is it is not sustainable. Pushing or exceeding saturation limits forces the body to deal with the onslaught. The body was never intended to maintain saturation of any hormone. Thus it must have time OFF and if it can not obtain that, it will fight against the intrusion. If the intrusion is foreign, synthetic GH for instance, the most simplest way it will fight is via the formation of GH anti-bodies.
There is however a way to counter to the above. Though it is important to understand the science behind why you're able to counter the formation of anti-bodies. This is also quite possibly why I am a little bothered on the matter of a 5 day blast. The first problem I see is we don't understand what is that's actually going on:
We blast and saturate.
The body says, "Enough!"
We say, "Hell no!" and continue to saturate.
The body responds with the formation of an appropriate amount of anti-bodies to counter the intrusion. Proper anti-body formation can take to 2-3 weeks (give or take).
It is at this time GH results begin to dwindle....
Now here's the science - something that I introduced almost a year ago - I found no one (at that time - if there was, I'd like to know who they are as I'd love to read up on their work) which not only understood the above, but offered a counter methods to combat the bodies resistance. Worse, all I ever read about were the pro's using 30-60IU per in order to grow but never understanding why! They had felt they had simply reached a plateau, and more was necessary to grow. They were right and they were wrong! They needed more, not because they were at a plateau, but because of adaptation and desensitization. Thankfully there is a solution!
An appropriate method to blasting - the counter to anti-body formation is to remain one step ahead of their creation! That means when the body creates the necessary amount to effectively combat the onslaught, we INCREASE the dosage or double up as I've said before. In this fashion we are able to always stay one step ahead of the body's defenses. You see the body will form just enough anti-bodies, however we in turn counter that resistance via doubling up dosage. Of course, the body will in turn counter this increased intrusion (our doubling up) via forming even more anti-bodies, and then yeah - we in turn double up again! However due to unreasonable costs to stay ahead of the game, it becomes unreasonable to continue AND we'd gain more by ending the cycle only to repeat the process at a much later date, at least a month, i.e after we've regained most of our sensitivity.
There is more to say, however I'm no longer answering your question. Sorry about that.