Great helmet overall, very lightweight, does not feel like you are wearing one at all. I was worried about the fitting mechanism, there is no traditional dial, it's a HJC proprietary spring loaded system that 'just fits'. But my worries are unfounded so far, the helmet fits snugly and have not found it to move in long hours of riding. Ventilation has worked pretty well in Chennai humidity so far also.
Overall, an expensive but worthy long term investment.