I do, for GRVL.
Worth it? Not sure how to answer that. Value wise, probably not. Comfort? Yeah it’s comfortable. So are several other helmets. If someone has an issue finding helmets that work with their particularly shaped head, it’s a no brainer.
How does it work? You place an order, download the app. Follow the prompts, take and upload some specifically angled photos. You wait some. They send you a 3D printed “shell” with some adhesive pads and you follow the QR code to the online fitting instructions and click the appropriate prompt responses.
Then you upload a photo with the cap on (after the fitting process) .
I look like the love child of an Imam and a whiffle ball☺️
Eventually they send you an extremely well packaged helmet.
FYI - It ships with the catch (the thing you twist a knob to tighten/loosen a regular helmet) disassembled. Literally take two seconds to attach.
First impressions… felt a little strange and more snug than I was expecting from a “custom” helmet. Five minutes into the first ride and it felt like I wasn’t even wearing a helmet.