Just received my 2012 Aeon a couple of weeks ago. The air flow is awesome ( killer compared to my old Louis Garneau). And so light it's unbelievable. The Roc Loc micro adjust works great and conforms to my head nicely. I weighed my medium ( my head is 58 1/2 cm) at 227g. I'm sure if i cut the straps to length I'd save a couple of more grams.
Over all a great helmet with aggressive design.