In reply to navigator:
The one nit-pick about this is that sending a jacket all the way to Portugal to fix a zip does not seem to be very environmentally friendly. However, short of licencing a whole load of approved tailors/sewers around the world who could provide this service more locally I'm not sure how to improve on this while still maintaining quality control.
I used to work in outdoor retail and dealt with returns; Patagucci were far and away the best company to deal with in this regard. I've stuck with buying their kit since about 1987, and i'm still using some items which are over 20 years old.