In reply to UKC Gear:
"...climbing with the rucksack on I've found my helmet being pushed forward by the top of the rucksack every time I look up. The rucksack has not been full at this point, and the top pocket only contained a pair of mitts and a headtorch. This is not ideal if you're intending to climb with the pack on..."
This is either a problem with the fit (pack too long, user error) or the design (maker error), or possibly the packing. But either way it's intolerable on a climbing pack, especially at this price.
I've always liked Crux's aesthetic and direction, but on the two items I've bought, there was at least one basic, significant flaw (Flak jacket hood too small/tight, Napoleon zips badly designed, Flak trousers shorter than advertised, waistbelt clip broke) that severely affected their usability.
So I've just never been able to justify paying their prices again. I do wonder if they bite off more than they can chew, in terms of executing all they try to achieve.