Think others have covered this now but, personally I find the central mirror is the one I use most as it can be glanced at regularly without diverting ones eyes too far from the road ahead. I use the side mirrors more for lane changing etc. The central mirror, small but slightly convex, is fitted to a rod and can be adjusted up and down for use with or without the hood. Whilst the view ahead would be clearer I don't think that I would now be comfortable without this arrangement.
