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I bought this helmet at the beginning of this season, and have had a great time with it. I also have 509 goggles and love how the nose-guards interlock, you could almost go without goggle straps it fits together so well. The helmet is warm, with sufficient venting, the padding / liner are comfy, and it feels light while riding.
My only complaint is that the breath guard (which fits, and seals to my face well) sometimes comes un-snapped with the cheek pads in the helmet. This is only a minor inconvenience though, I might just glue the snaps permanently.