I happen to not like the rounded road helmets for only one reason, the bar is too close to my face. Years ago I had a fork snap in a BMX race over a set of jumps and I hit face first on the top of one of the jumps. The Shoei I was wearing cracked the mouth guard and the strap gave me a black and blue hangman's smilie around my neck but my face never hit the ground or the bar. I can force a round helmet back til it touches my face, I don't want one of those on my head if I were to ever crash hard again. I was however, forced to buy a Bell Revolver flip up because being a motor ref for bicycle races, I need to be heard, not muffled, plus it makes talking into a radio much easier.