AMusingFoolwrote a review of Smith Overtake MIPS Helmet on July 25, 2018
Familiarity: I've used it several times
I bought this for the extra promised safety, vis a vis the MIPS and koroyd. Thankfully, I haven't tested those features yet.
But what did surprise me right off was just how comfortable it is. My head doesn't finish rides as covered in sweat as in my old helmet, so it seems the ventilation described is for real. And just sitting on my head, it's very easy to forget that it's there.
Edit: I forgot one possible disadvantage (hasn't affected me). You can't use strap-based helmet mounts for cameras or lights. And that would apply for all koroyd helmets.