Yes, I have been sewing for many years, but I still dont think this repair is as difficult as some of you may think. What's difficult is trying to write out directions for folks who haven't a great deal of sewing experience, so, the author had to include deeply detailed instructions. It may help to think of it as an overly large patch, that simply is the size and shape of the baffles. Fold under edges & stitch - do your best to follow on top of existing stitch lines. Tada! You CAN do it!
She mentions that if you err when trying this you can send it in for repair. Can you provide me with the address as to where I can send my jacket?
Check out the How I built this episode with the Patagonia founder.