Varies from person to person but most are 2-3 weeks! I’ve been wearing one for over 4 years and my scalp health is totally fine ! I have more information at zackthebarber.com
Glad you are excited, but don't use a car length of 3 for AP at 83MPH, a sudden stop or road hazard ur gonna rear end the car in front. Use AP at 7 and you have to be very diligent above 75. This is for your own safety, AP is fantastic but using it near it's limit u need to be careful. AP maxes out at 90.