I find, after using a Take-A-Look for some years now, that scanning for traffic by changing the angle of my head or looking up is almost intuitive.......kind of like I hated bifocals years ago-- took a week to get the unconscious moves down. Now I have progressive tri's and it's thoughtless. When I first began the mirror I thought, "What is this damned thing!" The benefits are worth the time getting accustomed.