I've also been using creatine but i actually have been using it for a long time back when I was just working out my upper body for muscle. Anyway my vert hasnt been improving as fast as yours but that might be because my starting vj was 6 inches higher. Anyway I have been kind of lazy and I usually only take creatine on days i go to the gym which is 3-4 days a week(I started going less cuse my upper body is about as big as i want it now). So The question I wanted to ask is are you taking it every day?