I got a 661 Recon (right size) but it sat too high on the head, actually not coming down as far at the back as my road helmet. Off the head of course it looks like it will provide good rear coverage.
It went back for a refund. I might have tried the next size up but didn’t think it would work and was far from impressed with the quality of the thing with the padding pieces hanging off it – they are only secured by small dots of a very fine version of velcro.
I had waited ages for it to come out but then it did not have the adjustable peak of the pictured ones which further reduced its utility.