I've used a reasonable amount of Decathlon/Quechua stuff, and have also peeked into their R&D/prototyping (but not production) facilities at the big Quechua store in Sallanches, France.
The quality is excellent as is the aftersales. The bladder in my running pack started leaking after a year (about normal for ultramarathon), and they replaced it no questions asked. They didn't have the exact same model in stock, so told me to select whichever bladder I wanted from the shelves and it was mine.
I wouldn't hesitate to buy stuff from them if it was what I wanted. I'm not aware of any large scale gear "manufacturer" (including Alpkit) that doesn't outsource most of its manufacturing, usually to SE Asia.
Thanks thruhiker that's great, I'll pm you to arrange logistics.
SD - yes, I can take the relevant food in, I've checked the USDA lists. I'm keen to avoid spending day 1 of my holiday in a supermarket trying to find suitable food for a 10 day trip, and then packing it into a bearvault.
Anybody got a post-2005 Bearvault canister? Am looking for one for a trip next year, I can always rent in the US but if someone has one kicking around in the UK it would make it easier to pack food before we leave. Happy to buy or rent it from you if you think you'd like it back!