"Aero M is so named because it's 'M'y 'M'ysterious 'M'elty and 'M'oussey air in chocolate, apparently - hope that clears up any confusion. It suffers from the typical Japanese excess packaging: inside the cardboard case is a plastic wrapper, which contains another cardboard sleeve holding the actual choccy. 'M'aybe this unwrapping game counts as the 'M'ysterious bit? Anyway it turns out not really to be 'M'oussey, but pretty much exactly like little Wispa bars. Tastes pretty good, especially the Bitter variant with plainer chocolate. And, despite the upmarket-styled packaging it's not bad value either."
http://www.snackspot.org.uk/