I’ve got a copy cat version in kids size from a high street store. Perhaps the best £60 I’ve ever spent. Going for a kids age 15 means it isn’t quite so bulky but is still roomy.
Is it stylish, no. Would I wear it for a nice lunch, theatre trip or shopping, no. But, do I wear it when watching kids rugby in a blizzard, or hockey in torrential rain, or to walk the dog over hill and dale in the depths of winter, or on a blowy beach in December, yes.
I’d buy a slightly cheaper version which in my experience is still excellent and not quite so bulky, and then with the extra cash perhaps a second coat for when it isn’t so wet / wild / outdoorsy.