Guess I'm in the minority here. Picked up a used EXO700, AND a Shoei RF900 from Dubguya few months ago. Both size large. Had been using an EXO400 for years, and was looking forward to "stepping up" to a Shoei for what I assumed would be a quieter helmet, better air flow, comfort, etc. As with my older 400, I can't tell a difference when the vents are open or closed, on either the exo700 or the rf900. The Shoei does not seem quieter. If anything it may actually be noisier. The shield on the rf900 doesn't fit as tight as the exo700. The 700 shield just feels more solid. The Shoei fogs up MISERABLY. No fog on the 700. And finally, and this may just be specific to my head, but the exo700 just seems to fit better than the RF900. (although the liner in the 900 is dry rotting, so I'm sure that's not helping.