I'm glad I did not read that review before I purchased my exo1000. I agree that the sizing is a bit odd, I usually take a L but require a XL for this helmet. The air bladder does let me tweak the helmet fit which I find helpful when I am wearing a balaclava in cold weather.
I love the internal sunscreen. It works great and I don't know how I got along without it. Its great not having to carry a separate pair of sunglasses.
Regarding airflow, I find the airflow fantastic. It flows so much air that, on the first day I was using it, I kept reaching up to close the shield only to find the shield already closed.
My only compliant is the fog-free face shield. Its not any less fog resistant than my cheaper Exo400. In cool weather, say 50 F. or less, I have to keep the face shield cracked open a bit or it fogs up pretty bad.
Overall, this is a great helmet and I highly recommend it.