I feel stubble within 3 hours! But I hate to shave myself, *, and it is very costly to go to the barber for a shave twice a week. I may be forced to let it grow again just because I will have no choice.
I really, really, really wish that I had invested in laser removal back when my hair still had full color. Once it started turning grey it is too late.
*(and now that I am losing function in my neck and shoulders it is really difficult to reach to the back of my head or even to shave my neck. I cannot tilt my head back at all anymore so I cannot see to shave under my jawline and soon I will lose the ability to turn my head side to side as well. I can no longer get my arms to go more that 90 degrees perpendicular to my shoulders so it is tough to reach the back of my head for any purpose)