I think a lot of their stuff is made in China, like some of the outerwear. Production in the US/CA is one of my biggest reasons for paying the high premiums though, so that would be a big turn off for me.
Reigning Champ is typically a bit more relaxed than W+H, but on average I take the same size in both brands (medium).
Their quality is awesome, and has only gotten better over the past few seasons. My first piece, a blue recycled fleece crew neck has pilled significantly on the trim, but the more recent pieces I bought from last F/W have help up really well and still look new. I personally prefer the look and feel of their heavyweight terry over W+H's large loop terry, but I also recognize that the two brands are going for a different aesthetic and the W+H fabrics are typically meant to be more lush.
I received the new mountain parka today...quick thoughts. The design is nearly identical to their last version 2 years ago. The dark navy color is nice and has a subtle sheen. I was hoping the weight of the fabric would be a little heavier than the past one, which was that kind of thin chambray. This may have about an ounce on that fabric, and is more comparable to the weight of the winter corded cloths - so feels just a bit more substantial....not by much...but just a little. Like the last one, the arms are cut on the long side, but it's okay as I think it looks better with the cuffs flipped up once. While the white leather pull is a nice touch, it is on the thin side. Smooth riris. I am a true to size small (36 suit, best buttons ups fitting 19" pit and 17" shoulders) and the size small is ideal. I would say it even leaves some room to easily layer a thick sweater. note it does not wick water as well as the last. Very clean and handsome jacket. The brogue buttons are a nice understated detail. A relatively 'plain' piece that will still draw attention and compliments. B+