My theory regarding creatine respond is that it works best for people with low natural oestrogen into blood
They are holding less water normally, which the creatine changes pretty fast
I used it for about 3 weeks when i just started training ( 11 months ago ) and responded really really good ( especially pump at training ) and I was/am skinny kid and naturally not holding much water
I stopped usage because my face became less lean due to water, I hated it so I stopped, but the fact that my face looked different shows that I responded great to the effect of holding more water
Was also 9,99$/ 500g monohydrate from germany