Josh McAlisterwrote a review of POC Ventral Air Spin Helmet on May 13, 2019
Familiarity: I've used it several times
When MIPS came onto the scene, many were skeptical of it's claims and the increased price tag. Now, a few years down the road, most protection companies have adopted their technology into their lineup but only POC has improved upon it. SPIN offers a new level of rotational forces mitigation for repeated impacts, lessening the consequences of the big crash you'll hopefully never have.
The Ventral fits incredibly well, offering excellent ventilation and adjustment. The only downside for me and my large head is overall profile - it is not a small helmet. However, the safety benefits far outweigh the issues of vanity. I doubt I'll trust another brand with my brain for a long time.