> It usually fails to save me any time, and causes a lot of headaches. If it takes you much more time and effort to navigate traffic than the average road user

> It usually fails to save me any time, and causes a lot of headaches. If it takes you much more time and effort to navigate traffic than the average road user you won't benefit much from Waze because any gains in time will be negated by the time penalty (relative to average) every time you need to do something that requires being aggressive (merging, left turns, etc). Similarly if you're driving a large commercial vehicle you should probably not use Waze.