I've been doing it for almost 1 year; started doing it because i was bored one night, lol. Prior to that, Ive already had a nice size/girth erect and stamina/recovery time wasn't really an issue. I am not sure if its just my hardcore workouts, my supplements, or the kegels, but i have notice an increase size of my package when its soft (its fatter) but as far as erect... its the same size. I can shoot further, my drive has increased (but that may be my supplements as well), and i definitely have better urine control... there is nothing like having to seriously 'GO' when you are in the middle of a set!