I started about a month ago.
My initial stat were 5.70 BPEL and 5.1 MEG
after a month and several measurements i gain 0.2 inches ( 0.5 cms) in BPEL and MEG.
I started noticing flaccid gains, it looks plumpier and hangs better.
I suppose its genetics, everybody is different. maybe they are newbie gains don't know but I will keep going and measure again next month...