Just wanted to give a personal recomendation to PhD for their amazing service.
I owned one of their sleeping bag for a couple of years. the zipper fell of the rails and was lost ( i lent it to somebody else. doh!). i emailed about a repair and they told me zips have a liftetime warranty. I posted it saturday and it was back with me Wednesday. Amazing service - you get what you pay for and this was definitey worth it..