Did you try it out first at a store? Different helmets have different fits and I would never purchase one without having first trying it on no matter how good the deal (unless I was sure I could return or resell easily). Reviews for helmets are almost a wash/useless unless there is something fundamentally wrong with it. Also the Atmos seems to be more of a racing helmet which has too much venting IMO for winter use, or in your specific case the flashy colors that grab drivers attentions that I look for in a commuter helmet.
otherwise hope it all works out!