I've tested this helmet on several occasions where I ended up in the hospital. Yes, I bought a new helmet after each "test" and my head never was the worst of my injuries.
That's why I continue to buy the same helmet over and over.
Fits really well. Very lightweight and comfortable. I can hardly feel it on my head comparing to my previous helmet. The L size fits the 58cm head really well.
This helmet is comfy and well vented. The glasses garage is such a nice thing to have as well! Plus, after a crash at around 40mph my noggin was safe.
The Octal MIPS is extremely lightweight with good ventilation. I like how far down the helmet comes in the back for better coverage.