First time trying this company (MT) and I am very satisfied.
I chose the size based on the sizing chart and I managed to have it fit a little tight as it should be.
The clear visor is perfect! It comes down below the chin, turning the helmet into a Full Face without losing visibility down low. With real FF helmets, I can't see the dashboard with the scooter's instruments.
Also, the visor is so clear and transparent (for now, until I start banging it) and most importantly, it does not distort due to curvature, so you completely ignore its existence. It has a small smoke visor that can be used alone or with the large one down because its operation is done with an external switch on the left side hinge.
Now, about noise, it has a little issue. With the Africa, which has a tall windshield, it is almost inaudible, not even on the sides. With the scooter, which has a smaller windshield, the air is diverted but hits the top of the helmet and the noise is quite noticeable.
As for ventilation, it is relatively good, I have not tried it in hot weather.
With the large windshield completely down, no air enters at all, so I suspect it will be difficult in the heat. However, the windshield comes down in two steps and in the middle it ventilates very well without hitting the eyes. The two small air vents it has at the top I did not feel any difference whether open or closed, but this applies to most helmets. Perhaps they send a little air that is not noticeable.
Overall, as they say in my village, a reliable and worthwhile purchase.