How many of you , if any, wear one of those Simpson neck rolls/braces? It seems like many PeeWees and kids use them but few adults. I just read another post talking about a guy breakng his neck in practice. I ruined my right leg last year and know how devasting an injury can be even when just riding for fun. I've been seriously thinking about one of these neck rolls, but am not sure of its value. Will it prevent a broken neck? How much does it restrict you head movement (and thus vision). ALL INFO APPRECIATED!!