I have used bar-end mirrors for years and actually prefer them. They do take a bit of getting used to, but you dont have the obstruction of 2 big bits of ugly plastic right in your face when your riding. I am more of a life saver man and, to be honest, don't get overtaken that much. So the mirrors are not looked in every 10 seconds. I do look in them, but I would rather focus on the road ahead. And a little glance down and right (with your eyes, not your head) is hardly a bother. If it is a problem for you to do that you probably need a carer, never mind riding a bike.